(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
Get the Side-by-sidemug. by TMB June 17, 2003
Get the The Sidemug. 
crystal meth; the "side" from "upside down", slang for the top 3 "hard" drugs
up being coke
side being meth
down being heroine
up being coke
side being meth
down being heroine
by princess69 April 25, 2016
Get the Sidemug. 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
Get the on-the-sidemug. 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.
teacher: i think you mean angle angle side.
student: geometry can kiss my angle side side.
by hudo January 20, 2010
Get the angle side sidemug. 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
Get the Shebouygan Side-by-sidemug.