An acronym for "I wouldn't but Mufeng would," usually means that you would not do anything that Mufeng would do.
Dude 1: "Hey would you fuck a guy in the ass for a billion dollars?"
Dude 2: "IWBMW"
Dude 1: "Real talk."
Dude 2: "IWBMW"
Dude 1: "Real talk."
by thefuckingzenmasterdyang January 4, 2010