1 B2 idiomatic informal
To suddenly abandon a plan, event, or commitment, leaving others to manage without you.
"She bailed on the study group again — that's the third time this month."
inseparable
bail on
B2 informal inseparable transitive
To abandon a person, plan, or commitment, often suddenly and without adequate notice.
In plain English
To suddenly leave or not show up for someone or something you said you'd do.
What does "bail on" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 B2 idiomatic informal
To abandon or betray a person when they need your support.
"I can't believe he bailed on his best friend right when things got difficult."
inseparable
Usage tip
Common in North American informal English, particularly among younger speakers. Implies a degree of betrayal or unreliability. Often used in social contexts: 'He bailed on our plans again.' Slightly stronger negative connotation than 'back out of'.
Words that pair with "bail on"
Natural word combinations native speakers use most often.
plans friends date team commitment project
How to conjugate "bail on"
The five tense forms you'll use most often.
Base
bail on
I/you/we/they
3rd person
bails on
he/she/it
Past simple
bailed on
yesterday
Past participle
bailed on
have + pp
-ing form
bailing on
continuous
Hear "bail on" in the wild
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