Don't flake out on me tonight; we've had these dinner reservations for weeks.
The speaker is calling out a friend who has a habit of canceling last-minute, urging them to follow through.
Phrasal verb: flake out
Vibe: Behavior and social impression
To cancel plans at the last minute or fail to show up as promised, usually due to laziness or unreliability.
He said he'd help me move today, but he flaked out at the last minute.
You picture a text message popping up on your phone ten minutes after you arrived at the restaurant, saying 'So sorry, I'm just so tired, can't make it tonight!'
Real-life examples
I was supposed to study with Sarah, but she flaked out again.
Expresses casual annoyance about someone who repeatedly breaks small commitments.
Synonyms
Contrast & nuance
'Flake out' implies canceling due to laziness, poor planning, or unreliability, often accompanied by a weak excuse. 'Bail' is similar but can mean leaving an event early. 'Ghost' is harsher—it means completely disappearing with zero message or explanation.