to prepare to beat someone up/get really angry after they've done something appalling: (Usually meant as a joke between friends.)"Yo g, if you don't stop bugging me, I'm gonna bust open a can of whoopass on you!"
An whoopass idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with whoopass, allowing users to choose the best word for their specific context.
Dictionnaire de mots similaires, Différentes expressions, Synonymes, Idiomes pour Idiome whoopass