Green’s Dictionary of Slang

1. to break a date.

1989

P. Munro Sl. U.

2. to leave a person or place.

1989–2003		R.O. Scott Gay Sl. Dict. 🌐 bail: [1990s] v. to leave or abandon. (‘Eric you’re not going to bail on me, are you?’).
1997		J. Birmingham Tasmanian Babes Fiasco (1998) 212: He bailed on this place while I was away. Ripped us off pretty bad.
1997–2001		Online Sl. Dict. 🌐 bail on v 1. to leave or abandon. (‘You’re not going to bail on me, are you?’).
2003		B. Malloy Year of Ice 79: I think, poor Laurie, her aunt was gonna bail on her just like Dad was gonna bail on me.
2008		R. Price Lush Life 443: If you continue to bail on them like this [...] it’s gonna be bad .
2020		S.A. Crosby Blacktop Wasteland 171: Jenny had bailed on him, but that wasn’t such a bad thing.