The Borderline Personality Disorder (BPD) Glossary is a collection of terms used in understanding BPD dynamics, patterns, and therapeutic frameworks — for those navigating these relationships or studying the disorder.
Glossary
A
- 📝Abandonment Sensitivity — An extreme fear of being left, ignored, or rejected — real or imagined — where even minor acts like being late or ending a phone call may trigger panic, rage, or despair.
B
- 📝Boundary Testing — Behaviors that provoke or challenge established boundaries, often to confirm whether the relationship or person is safe, consistent, or abandoning.
C
- 📝Codependency — A relational pattern in which a person derives their sense of identity, purpose, and self-worth from caretaking or managing another person's emotional state.
D
- 📝Devaluation — Seeing someone as all bad, often after a perceived failure or slight, frequently following immediately after 📝idealization and often not remembered or acknowledged afterward.
- 📝Dialectical Behavior Therapy (DBT) — The gold-standard treatment for BPD, focusing on skills like emotion regulation, mindfulness, interpersonal effectiveness, and distress tolerance.
- 📝Discard — The phase in a BPD relational cycle where the person abruptly withdraws, ends the relationship, or treats the other as if they no longer exist.
- 📝Dissociation — A psychological process of disconnecting from thoughts, feelings, surroundings, or sense of identity — a DSM-5 diagnostic criterion for BPD.
- 📝Distortion Campaign — A systematic effort to discredit or smear a person who has attempted to set boundaries or leave the relationship, often involving lies or exaggerated claims.
E
- 📝Emotional Dysregulation — Inability to manage intense emotional responses, leading to extreme mood swings, anger, or despair, often out of proportion to external events.
- 📝Emotional Hemophilia — A metaphor describing the lack of an emotional "clotting" mechanism, where deep psychological pain results from small emotional wounds.
- 📝Enmeshment — A relationship in which boundaries between individuals are blurred and identity becomes intertwined, often presenting as codependency or "fusion" in BPD dynamics.
F
- 📝False Emergency — A fabricated or exaggerated crisis used to regain attention, control, or proximity when boundaries have been set.
- 📝Fawning — One of the four trauma responses (alongside fight, flight, and freeze), characterized by people-pleasing, appeasement, and self-sacrifice to prevent emotional volatility or abandonment.
- 📝Flying Monkey — A term borrowed from The Wizard of Oz referring to third parties manipulated into doing the person with BPD's bidding, spreading rumors, or pressuring someone to return or apologize.
G
- 📝Gaslighting — A form of psychological manipulation in which an individual causes another to doubt their own perception, memory, or reality.
- 📝Gray Rock Method — A communication strategy of deliberately becoming as uninteresting and unresponsive as possible to avoid triggering emotional escalation.
H
- 📝Hoovering — Attempts by the person with BPD to "suck you back in" after a breakup or boundary has been set, often through dramatic gestures, self-harm threats, or love-bombing.
I
- 📝Idealization — Seeing someone as perfect, savior-like, or all-good, typically occurring in the honeymoon stage of a BPD relationship before the shift to 📝devaluation.
- 📝Identity Diffusion — A hallmark trait of BPD marked by the absence of a stable and consistent self-image, with rapid shifts in careers, values, and sense of identity.
L
- 📝Love Bombing — An overwhelming display of affection, attention, and flattery deployed early in a relationship or during reconciliation to create rapid attachment.
M
- 📝Mirroring — The unconscious adoption of another person's interests, values, mannerisms, and personality traits, driven by 📝identity diffusion.
O
- 📝Object Constancy — The developmental capacity to maintain a stable emotional connection to someone even when they are absent, angry, or disappointing — frequently impaired in BPD.
P
- 📝Parentification — A role reversal in which a child is compelled to function as the emotional or practical caretaker of a parent, common in BPD family systems.
- 📝Projection — Attributing one's own unacceptable feelings or traits to someone else, such as accusing a partner of lying while concealing something yourself.
- 📝Projective Identification — A more advanced form of 📝projection in which the person unconsciously induces others to feel or behave in ways that confirm their projected beliefs.
Q
- 📝Quiet BPD — An informal subtype of BPD in which emotional intensity is directed inward rather than outward, resulting in a presentation often missed or misdiagnosed.
R
- 📝Radical Acceptance — A 📝DBT practice that emphasizes accepting things as they are — without resistance, even if painful — as a means of ending suffering.
- 📝Reactive Abuse — When a victim lashes out in desperation or defense after prolonged emotional or psychological abuse, only to have their reaction used as "proof" that they are the abuser.
- 📝Rescue Triangle (Drama Triangle) — A relational dynamic in which people shift between the roles of victim, rescuer, and persecutor, often with all three roles played by each person in the same interaction.
S
- 📝Shame Spiral — A self-reinforcing cycle of intense shame that escalates beyond the triggering event, consuming a person's entire sense of self and driving destructive BPD behaviors.
- 📝Splitting — A defense mechanism in which people are viewed as all good or all bad, where a person with BPD may idolize someone one day and demonize them the next, creating unstable and chaotic relational dynamics.
T
- 📝Trauma Bond — A powerful emotional attachment formed through cycles of intermittent abuse and reinforcement, creating a biochemical dependency that mirrors addiction.
W
- 📝Walking on Eggshells — A metaphor describing the experience of being in a relationship with someone with BPD, feeling like any misstep could trigger an emotional explosion.