The can of whoopass is a term meaning to unleash great pain unto a target, specifically someone you have feelings against.
It ain’t gravy
Or clams
It ain’t the salmon or the processed ham
You just opened up a great big can of whoopass
Or clams
It ain’t the salmon or the processed ham
You just opened up a great big can of whoopass
by Literally Just A Toaster September 02, 2019
basically it means when someone or you are threatening someone that you're gonna kick their asshole to the moon, ya jew-tard
Bob: fite me nigga
Joe The Fitness Trainer: don't make me open a can of whoopass bitch
Bob: I just did though
Joe The Fitness Trainer: don't make me open a can of whoopass bitch
Bob: I just did though
by LargeWillyHaver59 January 19, 2018