The Complete Co-Parenting Glossary: Terms Every Co-Parent Should Know

Co-parenting comes with its own vocabulary. Some of it is legal. Some of it is clinical. Some of it has emerged from the lived experience of people navigating high-conflict situations and needing precise language for what they were experiencing.

This glossary covers the terms that come up most often, with plain-language definitions and links to the full guides where relevant.

Legal and Custody Terms

Legal custody. The authority to make major decisions about a child's life: education, medical care, religious upbringing. Legal custody can be joint (both parents share decision-making authority) or sole (one parent has primary authority). Joint legal custody does not require equal parenting time.

Physical custody. Where the children primarily live and sleep. Physical custody can be joint (children spend significant time in both homes) or primary (children live primarily with one parent with regular visitation for the other).

Parenting plan. The legal document that outlines the custody arrangement, including the regular schedule, holiday schedule, vacation time, communication provisions, and decision-making authority. Also called a custody agreement or custody order depending on the jurisdiction.

Parenting coordinator. A neutral professional, often an attorney or mental health professional, appointed by the court or by agreement to help resolve co-parenting disputes. In many jurisdictions, parenting coordinators can make binding decisions about minor disputes without requiring a return to court.

Guardian ad litem. An attorney or trained advocate appointed by the court to represent the children's interests in a custody proceeding. The GAL conducts an independent investigation and makes recommendations to the court.

Modification. A legal change to an existing parenting plan or custody order. Modifications typically require showing a material change in circumstances and going through the court process unless both parents agree.

Right of first refusal. A parenting plan provision that gives one parent the right to care for the children instead of a third-party caregiver when the other parent needs childcare during their parenting time. Common but contentious in high-conflict situations.

Contempt of court. When one parent violates a court order, including the parenting plan. A contempt motion asks the court to enforce the order and may result in penalties for the violating parent.

Communication Frameworks

BIFF method. Brief, Informative, Friendly, Firm. A communication framework developed by Bill Eddy for high-conflict situations. Responses are two to three sentences, answer only the logistics question, read as civil to any third party, and leave no openings for negotiation. See the BIFF method guide and 20 BIFF response examples.

Gray rock method. A communication strategy for high-conflict or narcissistic co-parenting situations. You become deliberately uninteresting: flat, minimal, logistics-only responses that give the other person nothing to engage with emotionally. See the gray rock method guide.

Yellow rock method. A middle ground between gray rock and open engagement. Warm enough to appear cooperative (useful in legal contexts), but without sharing personal content or emotional material. See the yellow rock method guide.

Parallel parenting. A custody structure in which both parents are active in the children's lives with minimal direct contact between them. Communication is logistics-only, happens in writing, and each parent makes day-to-day decisions independently during their own time. See what is parallel parenting and parallel parenting vs co-parenting.

Manipulation Tactics

DARVO. Deny, Attack, Reverse Victim and Offender. A pattern identified by psychologist Jennifer Freyd in which someone confronted about harmful behavior denies it, attacks the person who raised it, and positions themselves as the victim. Common in co-parenting communication with high-conflict individuals. See the DARVO guide.

Gaslighting. A manipulation pattern that challenges your perception of events you experienced directly. "That never happened." "You are remembering it wrong." Most effective when there is no written record of what was actually said.

Triangulation. Using a third party, often the children, to communicate accusations, gather information, or apply pressure. "The kids told me you said..." Common in high-conflict co-parenting.

Love bombing. An unusually warm, generous, cooperative message or gesture that is out of character and typically precedes a request. The warmth is the setup, not the actual communication.

Manufactured urgency. Creating a false sense that something requires immediate response, compressing your decision-making time deliberately. "I need an answer right now."

Parental alienation. Behavior by one parent that damages or attempts to damage the children's relationship with the other parent. Can range from subtle negative commentary to overt interference with parenting time. Recognized in family courts as harmful to children and potentially actionable.

Custody Schedule Terms

2-2-3 schedule. Two days with Parent A, two with Parent B, three rotating back and forth. Children never go more than three nights without seeing either parent. Recommended for younger children. See the 2-2-3 custody schedule guide.

5-2-2-5 schedule. Five days with one parent, two with the other, two back, five with the other. The long block alternates. Two transitions per week. Common for school-age children. See the 5-2-2-5 schedule guide.

Week-on/week-off. Alternating full weeks between parents. One transition per week. Generally recommended for children 8 and older.

Holiday schedule. A separate schedule that overrides the regular rotation for specified holidays, often alternating year to year.

Makeup time. Parenting time provided to compensate when a parent's scheduled time is reduced due to a holiday, illness, or other circumstance.

Professional Support Terms

LMFT. Licensed Marriage and Family Therapist. A licensed mental health professional with specific training in relational and family systems. Relevant for co-parenting counseling and individual therapy for co-parents.

LCSW. Licensed Clinical Social Worker. A licensed clinical professional with training in individual and family intervention.

Mediator. A neutral third party who helps two parties reach agreement on disputed issues without going to court. Mediators do not make binding decisions; they facilitate negotiation.

Divorce coach. A practical guide through the process of separation and divorce. Not a therapist or attorney. Focuses on practical decisions and structures rather than emotional processing or legal representation. See do you need a divorce coach?

Co-parenting counselor. A therapist or counselor who works with co-parents (together or individually) on improving the co-parenting relationship or navigating its challenges. See the co-parenting counselor guide.

Two Paths Features

Message Decoder. A tool in Two Paths that analyzes a co-parenting message, identifies the tactic or communication pattern present, and suggests a response approach. See the Message Decoder page.

Expert review. A written review of your specific co-parenting situation by Cindy Weathers, LMFT. Provides licensed professional guidance on a specific message, conversation, or decision without requiring a recurring therapy appointment.

For a full library of co-parenting guides, see the Two Paths blog.