To set fire to oneself in order to kill bad guys all around you, like the guy from lord of the rings.
I was playing "Left 4 Dead" and the zombies all crowded around me, I decided to Denethor it with a molotov cocktail.
by That one kid named matt December 20, 2009
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To eat something as noisily and messily as possible. For best effect, it must be something juicy so it can spray everywhere.
C.F. Denethor's Dinner Scene in Return of the King (the movie).

"I'm so hungry! I'ma go Denethor a hamburger!"
"Thanks for the warning! I'll get my earplugs and poncho!"
by LoMinang August 5, 2005
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Complete shit-head who tried to kill Faramir. Total buttmunch. So *not* uber.
That guy's so mean...he's such a Denethor!
by Kat April 14, 2004
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The steward of Gondor. Son of Ectelion, his two sons are Boromir (deceased) and Faramir. He dies in <i>The Return of the King</i>, when he tries to burn him and his son, Faramir, to death.
You really suck, Denethor. I hate you.
by Drunken Hobbit September 6, 2004
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to eat very sloppily and violently, like denethor does in the lord of the rings 3.
by The more Awsome N September 30, 2009
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