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43.
Fucking someone up the ass cuz youre riding them and its in the ass so its fuckin dirty.

Jason Neiswanger: I gots to take a shower, I was just ridin dirty.
Mel: You know you liked it!
by Sha-nay-nay April 27, 2006
 
44.
1) driving around in a stolen car. 2) drving in a car that is not yours.
You might not wanna ride with me, I an ridin dirty right now
by laidback621 December 15, 2005