what the heck!
idiomPart ofheck
what the heck! — idiom
1. Said when someone decides to do something they know they probably should not do,
1.idiom
Definition
Said when someone decides to do something they know they probably should not do, often giving in to impulse or temptation.
Example
Gabriel looked at the price, shrugged, and said what the heck before buying it.
I should not eat dessert this late, but what the heck — life is short.