Something you randomly say when you want to sound retarded. It is a term that can be used to describe just about anything. If you yell it when you walk into a room everyone will think your cool, or get turned on.
Dude, John smells like a stinky butt hole today.
I just ejaculated into her stinky butt hole.
An asshole, who regularly cheats on their spouse. Sometimes a practicing bigamist. Also a habitual liar who often times believes their own bullshit. A S.P.B.F. will often times regard themselves as a noble person, believing that their inability to choose a singular mate is the result of "not wanting to hurt anyone". This is however an unrealistic view, as the rest of the world views them as a bunch of narcissistic assholes.
Michelle: "I do not know how to deal with this guy! He cheats and lies all the time!"
Heather: "Come on, Michelle. Did you really expect anything different from a STINKY PENIS BUTT-FUCKER?"