8
Formally used at the end of mathematical proofs to indicate their completion, informally to indicate an argument has been won. Literally "Which was to be demonstrated" (not just "which was demonstrated").
... Yeah well, I checked; they don't make dildos that big. Q.E.D.
by CletusInteruptus April 30, 2008
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9
A word used by intellectuals that, apparently, they are quite sensitive about if you translate incorrectly. Causes redness and itching on mathemeticians when misused.
Bert- "Q.E.D. means "quit earning dough." It's what you do when you decide to become a professor, right?

Professor Hubert, PHD- "I hate you, I hate you, I hate you!"
by Doctor Feltgood May 14, 2008
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10
"So you see, by this simple proof, your theory is wrong and mine is correct. QED, bitch!"
by MathmanX March 26, 2007
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11
abbreviation for Latin- "Quam Effusio Deleo," or 'How one annhialates enthusiasm, excitement, interest.' when someone uses this term in any form, understand they are trying to put you to sleep and violate you while you drowse, and probably take your wallet, regardless of how smart they sound, that drone you're hearing is only a substitute for the hypnotist's watch.
Professor Blumpkin finished his thesis with "and so you can clearly understand what I have demonstrated. It is simple, Q.E.D. The next thing I knew someone from the back row of the lecture hall was yelling, "Yo, Jimmy, look out" I roused myself to see Blumpkin removing his hand from my crotchal area. "What?" He protested, "I had just dropped my laser pointer, is all."
by Clevelend Steamer, PHD May 10, 2008
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12
After proving something in mathematics, used to indicate that said proof is complete.
Prove that x+3=0 when x is -3...

x+3=0
x=0-3
x=-3 QED
by goatsmacker June 12, 2004
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13
Quantum Electrodynamics: a branch of quantum theory describing the interaction of particles with photons. It's main proponenet was Richard Feynman, creator of the ever-popular 'Feynman diagrams.'
"quantum electrodynamics describes all physical phenomena except gravity, radioactivity and nuclear physics; there is no significant difference between experiment and theory" Feynman.
by DBell March 18, 2005
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14
A philosopher's way of saying "Booyah"!
"And thus it follows that x=12 you dumb shit! Booyah! Errr... I meant QED!"
by ADHDfidget May 02, 2017
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