Person 1 - "Dude, I hear Person 3 totally QED'd you when you were arguing yesterday"
Person 2 - "Yeah, it turned out that Pamela Anderson does have bigger tits than my mom."
Also "QED-MF", "QED, MF." Frequently followed by an exclamation point.
Abbreviation of the Latin phrase, "quod erat demonstrandum, muthafucka," meaning literally, "that which was to be demonstrated, muthafucka." Often declared exultantly at the end of an argument or mathematical proof to indicate that 1) the conclusion has been successfully shown; and 2) the opposing viewpoint have just been thoroughly served and/or pwnt.
Bob: God exists, He made the Universe.
Jill: Yeah? So prove it.
Bob: "In the beginning, God created the Heaven and the Earth." It says so right there on page one of the book that God Himself says He wrote! QEDMF. Sorry, atheists.
Jill: ...WTFever, tautology-boy.
An abbreviation for the Latin phrase, "Quad erat demonstrandum, bitch," which means, "That which was to be demonstrated, bitch." Typically written after tedious mathematical proofs.