"you: "hey, what's this stuff on your couch?"  your friend: "oh, someone apparently [sharted] and left buttmuck on my couch
1) buttmuck - when you don't wipe well after a dump, you see buttmuck stains on your tighty whities
""you: "hey, what's this stuff on your couch?"  your friend: "oh, someone apparently [sharted] and left buttmuck on my couch" What is the definition of "buttmuck"?