blow-out also blow‧out especially American English [countable]
a sudden bursting of a tyre [↪ puncture]:
I had a blow-out on the driver's side.
2 [usually singular] informal
a big expensive meal or large social occasion:
We went for a real blow-out to celebrate.
3 American English informal
an easy victory over someone in a game
a sudden uncontrolled escape of oil or gas from a well