Karmapoop
When you are farting at a friend but the fart turns out wet and leaves poop stains behind in your underwear.
Person 1 : *farts*
Person 2 : Ew fuck you !
Person 3: I think i need to change my underwear because i just karmapooped
Person 2 : Ew fuck you !
Person 3: I think i need to change my underwear because i just karmapooped