1.driving with drugs or other illegal shit in your car
2.anal sex
3.sex with a filthy whore
Dylan: hey guys i had sex with mikes sister last night, then i shat on her chest

Kyle: thats fucking sick, you were riding dirty, and get away from me, you smell like shit.
by Super Cool Ben May 31, 2006
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The act of having sex after a man has already ejaculated (especially inside of a condom) and him therefore possibly having viable sperm already on his penis.
Dude; I only had one rubber but she was good to go again, so I wuz riding dirty the second time yo-
by rickkym January 19, 2009
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Slang term regarding a semi-legitimate business of contraband. Contraband being an act that bridges the gap between economies because though you may arrest people, others will rise up and some will make up new words for the industry like "riding dirty"....which is really jsut a cheap attempt at a rapper with no talent and alot of funding to "rise" to the top, if you will.

You know Run DMC??? they were IT.....they were good...or Sir Mixalot....see, that's classic, but this bullshit...it just sounds bad. Plus i mean what the hell, if you really want to make money without working hard and get women....you get a PhD.....it's actually not too hard.....gullable women will admire you and most of the work is on your own timing......you show up at work at 2pm.....or not at all if you dont feel like it. Then when your done you will likely get promoted and work alot less then a gangster and make maybe 6X as much. And women will want to fuck you, because your a "Dr." and they think that it's the shit.

That's where it's at FOOL!
Riding dirty is for pussies....the real playa's get the "Dr." then they get the women and the moolah....sucka.
by Dr. bullshit October 9, 2006
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Not takeing a shower for 3 days, and rolling up to Taco Bell.
And if the "PO PO" is behind you waiting in the drive thru, then he's trying to catch you rideing dirty.
Taco bell employee: "Here is your ultima...*cough ...Oh god sir what is that smell?"

You: "Don't try to catch me riding dirty... Gimme my chalupa slut"

Then you ghost ride out the dirve thru..
by A-TEAM June 3, 2006
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* Refers to a game played between friends where points are earned for succefully having sexual intercourse with extremely obese women without being caught by one's friends. If a participant is caught during this horrific act points are taken away and added to the finders point total. These women only qualify if their obesity is comperable to the fat women featured in Spencer's gag cards.

* The Chamillionaire song "Ridin'" was created to commemorate a specific instance where the artist won this game by sexually pleasuring a morbidly rotund transvestite. This event led to additional (bonus) points for Chamillionare which gave him a solid lead and eventuallty a win in a game between him and his friends.
My friends caught me riding dirty. Now I need too sleep with six fat bitches in order to win.
by John Ben August 22, 2006
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A term used by the telecommunications industry to describe a transport circuit which is experiencing any combination of the following problems, line code violations, path code violations, errored seconds, severely errored seconds, unavailable seconds, ect.
That circuit's riding dirty, I can't even stream my p0rn!
by mememememmeme December 7, 2006
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