dirtbiking 

The act of shitting oneself whilst wearing tight biker leathers or racing suit.

'I almost crashed my road-bike yesterday, and ended up dirtbiking'.

dirtbiking by McTastic July 16, 2008

dirt bike 

A sexual act in which a couple gorges on spicy Mexican foot in the evening in preparation for sex later that night. Later in the night, the couple engage in sex doggy style and the woman develops uncontrollable, blow out diarrhea. At this point, the man grabs her arms, pulls them back behind her, and revs her like a dirt while she sprays feces all over the both of them (much like revving a dirt bike stuck in the mud)!

I knew Carla was kinky when she agreed to perform the dirt bike with me.

dirt bike by emmeff April 18, 2006

Radical Dirtbikes 

Used in expressing extreme joy or happiness; satisfaction.

Originated from expressing hysterical joy, and using the term radical to describe dirtbikes. The phrase "radical dirtbikes" eventually grew to mean feeling extreme joy over anything.

I just won the lottery! Radical dirtbikes!

Radical Dirtbikes by Prof. Wetwang August 4, 2004

Dirt Bike Poaching 

To ride your dirt bike somewhere that it is not normally permitted.

The other day we went dirt bike poaching on the golf course out by the lake.

Dirt Bike Poaching by Bramond July 18, 2011

dirt bike 

An internal-combustion machine used to massage the male prostate by thumping, jarring, and vibrating the perrineal area of the user.

He smiles when he gets off his dirt bike and says, "That was a good ride!"

dirt bike by Wonder Valley Linguist June 12, 2016

Dirt Bike 

The Dirt Bike Strictly for pros. This is when you have the girl on all fours, and you grab her wrists and pull her arms out while she is spraying diarrhea out (thus giving the image of you riding a dirt bike).

Craig: Hey Jim how'd the date with Kelley go?

Jim: Oh it was great but then we did the Dirt Bike on my bed and um,well I need new sheets now.

Dirt Bike by Major Rio December 29, 2007

Dirt Bike Games

The name of the game that you're playing when your teacher catches you.

STOP PLAYING FUCKING DIRT BIKE GAMES

Dirt Bike Games by TheTrumpet June 1, 2018