Top Definition
To be MABF-ful or to act like MABF.
Girl 1: "Oh my god, i didnt get a lead again!, i am soo much more talented than every one of thoses people"

Girl 2: "Shut up and stop acting like a MABF, im kidding, I really mean your acting simply MABF-Tastic"
by Get up and Shout September 11, 2007
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