Rectilinear Motion 

The formal mathematical term for anal sex.

John gave his student a hard rectilinear motion assessment.

Rectilinear Motion by bakeshop February 16, 2010

New Motion Cr3w 

a hip-hop crew that lives in clarksburg maryland, they consist of many styles of dance such as: Wave, Krump, Pop, Break, And Jerk.
Originator; B-Boy Korn
Follow Them On Twitter @NewMotionCr3w

www.youtube.com/NewMotionCr3w

ayee New Motion Cr3w killed that cypher

New Motion Cr3w by bboy korn January 26, 2011

Perpetual motion 

During 69 he suddenly shoves his cock deep down her throat causing her to both gag and vomit on his dick and fart into his face - in response he gags and vomits between her leg.

Eternal motion.... if it's more than a fart.

Hotel housekeeping refused to clean the sheets after the guests performed Perpetual Motion

Perpetual motion by Jennon the navigator November 2, 2016

gears in motion 

A plan that has just be started.

i have the gears in motion for april fools.

gears in motion by movember March 4, 2008

file a motion 

A bowel movement.

I had Taco Bell about 6 minutes ago. Excuse me while I file a motion.

file a motion by Stemshul September 3, 2016

chopping hands motion 

Another thing me and Rich came up with aswell as slammin' doors. the chopping hands motion is a lesser known replacement for the common 'wanker' sign, and involves moving your hands up and down in a chopping motion when they are about 6 inches apart and fairly parrallel. This came about in a bragging contest about the fashion in which we had to pleasure ourselves because of our over-sized penises.

someone-"why are you doing that in Perry's general direction"
me-"for a laugh really"

chopping hands motion by Barry the Baptist March 19, 2005

Brownian Motion 

The act of performing a Brown-eye whilst in a cartwheel.

That was some crazy brownian motion... he got the whole crowd...i cant believe he could cartwheel the whole field naked

Brownian Motion by Lincz October 19, 2006