Someone that gets dirt on their back from riding too fast on a motorbike.
Erik had a dirtback from riding too fast on the trail.
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The after effects of debris (mud / dirt) on riding gear (primarily on their backs) after a long day of dirtbike riding.
I saw 4 dirtbacks climbing a very steep hill on their dirtbikes.
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Low-class, trailer trash fuckhead.
Goddam dirtback, your mangy pit bull shat on my lawn again!
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Three days out of the week put aside for extreme dirtbaggy problems. Days are usually Monday, Tuesday and Thursday. Continue until a significance in dirtbaggy problems is achieved.
Happy Dirtback Day! Every Mon, Tues and Thurs.
Referring to the dirty back participants revive while having intercourse in a forest or field.
Dude, I can't wait to go dirtback riding with my girlfriend tonight
A person in COD zombies who gets downed 5-10 times,
"Yo stop being a dirtback and get good at the game"
A Dirtback is a Call of Duty Zombies player who goes down all the time and has to be revived constantly.
-The Word Dirtback was Invented by the Youtuber ColdRaven
"That motherfucker is a goddamn Dirtback he's gotten down 10 times already."