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.
by Major Rio November 30, 2007
This is a sexual act in the same realm as a cleveland steamer . This is when a guy is in a 69 position with a chick, but he is on top. The guy raises the girls legs up in the air like handlebars of a dirtbike, grunts, twists her right ankle and blast out a wet rooster tail of shit splatter all over the chicks breasts and face. Thus, it is like a wide open throttle on a dirtbike, creating a rooster tail of dirt.
Tom: Man, we drank too much Tuesday night and it gave me the beer shits.

Dave: Oh yeah, that's a bummer man

Tom: Yeah, but I put it too good use, I hooked up with Sally and gave her a good dirtbike!!

Dave: Haha, that's awesome!! S
by Dick Delaware December 08, 2011
"Dirtbike" refers to the penis of a male who has an unhealthy penchant for anal sex with his female partner. The name stems from the man's desire to ride the female's 'Dirt-Track'. Dirtbikes may also come equipped with "mud-tires" if the female is experiancing diarrhea at the time of intercourse, and "snow-tires" which refers to the male riding the 'dirt-track' after he has previously climaxed in it.
One must exercise caution when using a dirtbike on a fresh track however. The bike must be eased in to ensure that the fresh terrain could be ridden comfortably, avoiding any damage to either the bike and track. The process of "greasing the tires" with some sort of lubricant is probably a smart move for first time riders, and should be seriously considered.
"Adam loved riding his dirtbike in Carrie's dirt-track!"

"Adam loves anal so much that his dirtbike even comes with mud-tires!"

"Adam rode his dirtbike so hard that he got a flat tire!"
by Mister Higgins August 02, 2006
"Dirtbike" refers to the penis of a male who has an unhealthy penchant for anal sex with his female partner. The name stems from the man's desire to ride the female's 'Dirt-Track'. Dirtbikes may also come equipped with "mud-tires" if the female is experiancing diarrhea at the time of intercourse, and "snow-tires" which refers to the male riding the 'dirt-track' after he has previously climaxed in it.
One must exercise caution when using a dirtbike on a fresh track however. The bike must be eased in to ensure that the fresh terrain could be ridden comfortably, avoiding any damage to either the bike and track. The process of "greasing the tires" with some sort of lubricant is probably a smart move for first time riders, and should be seriously considered.
"Adam loved riding his dirtbike in Carrie's dirt-track!"

"Adam loves anal so much that his dirtbike even comes with mud-tires!"

"Adam rode his dirtbike so hard that he got a flat tire!"
by Mister Higgins August 03, 2006
A nasty ass chick, who doesnt bathe, has greasy hair, dirty clothes, looks like her makeup has been on for 5 days and she just reapplies, who is always tryin to pick up a new dude cause noone will go home with her.
"You see that dirtbike tryna to get my number?"

"What the hell is Leroy doin fucking with them dirtbikes?"

by coochie sniffer April 15, 2007
an annoying 2 stroke vehicle with a muffler note resembling that of a fart can honda civic on steroids, often driven by teens or young adults who feel they need to nearly hit every person or truck on the trails to act cool because of some form of self insecurity.
did you see that idiot on the Dirt Bike? he nearly ran straight into that parked truck flying down the trail, just barely missing the driver that had gotten out as well.
by neednotapply January 04, 2009
Noun: High speed off-road racing motorcycle. 2 strokes and 4 strokes.
4 stroke dirtbike = GOOD
2 stroke dirtbike = BAAD

Types of dirtbike:
Trailbike, Trials bike, Motocross bike
I jumped my dirtbike 135 feet.
He did a sick whip on his dirtbike
by Mike January 04, 2005

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