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A sidemon is one who is off to the side. The characteristics usually include stupidity, submissiveness, shiestiness, and sexual ambiguity.
Dave stole my stapler!
What a sidemon.
sidemon by Israel Johnson August 7, 2007
Related Words

Sidmouth 

The single greatest place in the history of mankind.
Sidmouth is a seaside town with it's very own sewage plant. Local attractions include Carina's, Sidmouth College and 'The Byes'.

Not without it rough parts, including murder, rape and drunkenness, Sidmouth is cultural melting pot with immigrants and locals working together in the towns booming hotel trade.
So? Where are you from?
-I'm from Sidmouth
Oh!? The single greatest place in the entire world!
Sidmouth by Pkillen December 13, 2010
A gay man who spends all his time on line or playing video games. 9 out of ten times will have a cat.
That guy never gets out, he's such a semount
semount by Count Dooku FN July 7, 2011
To steal or take without asking something from the side.
He sidemoused the bong when she wasn't looking.
sidemouse by Jaye Mkay August 9, 2012
really bad cs player that hates campers
hahaha if you keep camping i'm gonna slay you and eat your cookies
sideout by sideout October 4, 2004
sideout by side September 4, 2003