More endearing than most derogative terms for skanks. Used when you want to piss someone off and call them a name but you still love them. If they are a skank and need to be reminded sluffin probably wouldn't offend.
a combination of the words slut and muffin. a less harsh word used to call your friends slutty without offending them.
Friend 1: "OMG! I love you girl!"
Friend 2: "AH, I LOVE YOU, TOO! But sometimes you can be a real sluffin!"
Friend 1: "Yeah, I totally know. I shouldn't have hooked up with those 4 guys last night!"
An act of putting your nuts in somebodys ass while you have sex with them. In homosexual intercourse it would be having your full penis and nuts inside the anal cavity.
Ex 1 - Mark was "stuffin" adam last night behind the muffler shop