Noun- A human homosexual male's anus that is frequently penetrated and enjoyed by another gay man's penis. In male homosexual couples, the anus of the "receiver."
"Franz have you been cheating, your dick smells like another man's buttpussy?"
ITS A SMELL THAT COMES FROM BUTT-DICK-AND PUSSY COMBINED TOGETHER TO MAKE AN UNFORGETTABLE ODOR THAT WILL SEND YOU RUNNING.
OMG I WAS WITH THIS CHICKLAST NIGHT AND WHEN WE STARTED TO FOOL AROUND IT WAS GETTING PRETTY HOT THEN OFF CAME HER PANTS AND I WAS SLAMMED IN THE NOSTRILS BY HER NASTY BUTDUSSY.
This term is basically used to describe a combination of 3 things: Butt, Dick, & Pussy (Made popular by the "Friendship Alliance" on Big Brother 6 - Their secret made-up word that was originated by one of the Houseguests' friends)