when you moon someone with ur buttcheeks stretched appart so that your victim stares right into the hole or "eye". if two people do it its a two eyed monster, if three, its a 3 eyed monster, so on...

also it could mean a penis
he gave me a one eyed monster yesterday, lets give him a 3-eyed monster tonight to get him back
by Flump August 21, 2006
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When a person pulls down his/her pants and moons one or more people in a fashion that requires the person to use their hands to spred their buttcheeks apart and show their furry, brown asshole. This can be converted into two-eyed monsters, three-eyed, or as many eyes as you can find.
by Jörg December 11, 2006
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To jerk off, masterbate, relieve yourself sexually, jerk it till you cant work it, putting on some vaseline and greko-roman wrestling your penis
by A2K February 18, 2003
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little timmy used his one eyed monster worm to plow a furrow in little suzy's back pasture
by merryprankster1963 March 10, 2007
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when a person of the male caliber rubs his dong until love juices squit
"oh man, i feed the one eyed monster yestorday and some love juices suirted in my face
by Thach October 27, 2004
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A man's penis! extremely large in size and might scare women!
I pulled out the one eyed snake monster and she almost passed out!
by berty68 August 6, 2008
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A disturbing creature that sneaks up on someone, calls there name and simply stares. (an attack from one can cause paralysis)
Dude one time i was attack by a One Eyed Sea Monster and couldn't move for ten minutes!!!
by NinjaGangsta September 1, 2010
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