15
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
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16
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
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17
Instead of motorboating a girl's boobs, you do it in between her ass cheeks.
1)"What would you call a motorboat in between a girl's ass?"
"A dirtbike"
2) "Bro, Claire let me dirtbike her last night!"
3) "Her ass just makes me want to dirtbike her!"
by ThrashMetalAttack July 31, 2016
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