(n) or (v)The act of two men (gay, bi, straight) laying "side-by-side" and giving each other "hand jobs" and/or masturbating them selves. With three people this could be referred to as "skiing". See other terms such as Ohio State Cheerleader for examples.
"Wow Nate did you hear about Joey and that random doing a 'side-by-side' in Arizona ?" , " I always enjoy a good "side-by-side" at the fiesta bowl. "
by UT4EVA February 19, 2009
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crystal meth; the "side" from "upside down", slang for the top 3 "hard" drugs

up being coke

side being meth

down being heroine
"I still feel like I'm tripping, probably because I did 2 grams of side this weekend"
by princess69 January 14, 2016
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a) someone's sidekick
b) an offensive term for someone's mistress or lover
If you want an on-the-side definition b), don't be in a classical ltr; look for an open relationship instead.
by Sexydimma March 6, 2015
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a non-existent theorem in geometry that you can use to piss your teacher off.
student: do we have to know the angle side side theorem for the test?
teacher: i think you mean angle angle side.
student: geometry can kiss my angle side side.
by hudo January 20, 2010
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A unique game involving two male participants, facing one another, in which the players strapped their erect penises together with cinnamon dental floss(or some other fastening apparatus). The object of the game is to maintain your erection longer than your opponent. Obviously, homosexuals will have an advantage, though those of a high sexual fortitude may be able to overcome.
"That shebouygan side-by-side match was killer. Anthony lost his boner in less than 3 minutes. Scott was still rock hard and even spurted on him a little bit at the end.
by Dick Dazzler July 21, 2010
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The front side of a woman/girl
Veginal fucking
Natural Straight Fucking
Her A Side is boring and loose,
I played my girls A Side last night, it was brand new - I played it for the first time.
by Sameer July 8, 2004
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