A p3n0r is 1337-speak for penis.
Meh p3n0r pwns j00rs rofl.
by Snoogma February 18, 2005
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1337 'elite' speak for penis, usually used as a dumbass response to a question they either don't completely understand, or don't know the answer to. It's used to make the person stop asking questions, by making them walk away from the dumbass.
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More of the same lame-ass "1337" online language, referring to the more common pen0r or penor, meaning "penis"

Anyone who might venture to use this terminology is an idiot, and should be dealt with by severe beatings or vivisection.
Idiot: "p3n0r!!!!1111oneoneonewonwonwon"
Sane person: "I will kill you now."
by pizzozo March 3, 2005
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'Mean Penis' in L337-speak, also referring to "dickhead"--the insult.

Or, engaging the term to another who is a penis-sucking-whore.
leik0mz!!!11 u r t3h m3n0r p3n0r!!111 u suxx0rz!!
OR
leik0mg!!11 u suxx0r m4j0y m3n0r p3n0r!!111zz
by r0x0rz February 4, 2005
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