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20.
to have anal sex with someone
or to carry weapons or drugs in your car illegally.
"yo man i had a dream last night that me and sarah were ridin' dirty, if only i could get that prude bitch to try it"
by The one who knows all April 03, 2006
 
1.
driving in an automobile while having atleast a felony charge worth of illegal drugs and or unregistered firearms with you.

(sirens blaring)
dude #1: oh shit the cops.
dude #2: whats going on
dude #1: load this gat
dude #2: what the fuck, why?
dude #1: cuz i'm ridin dirty
dude #2: oh....alright(loads gun and aims at the police cruiser)
by jaytee October 22, 2005
 
2.
1.driving with illegal substances, firearms
2. name of a UGK (underground kings) album- ugk is pimp c and bun-b from houston,tx "south texas motherfucker thats where i stay"
"leave that killa at home i cant be ridin dirty"
by duh713 February 27, 2006
 
3.
It is the act of driving with a illegal weapon or drugs. First coined by Houston Rap group U.G.K.(Bun B and Pimp C)
In a song "ridin dirty"
"Somebody told the laws that Bun was the one ridin dirty."
by 713playaz February 19, 2006
 
4.
To drive in a vehicle with either illegal possesion of firearms or drugs or both
Police: Excuse me but you nigga's wouldn't happen to be ridin dirty?
Driver: Yeah we ridin dirty
Police: Well....I caught ya
by Miasmablk July 01, 2006
 
5.
Ridin' dirty is when you're in a vehicle and might you have police (da po po) after you because you have either drugs or illegal firearms.
Yo man, put that weed away, I don't wanna be ridin' dirty!
by xxYuli June 25, 2006
 
6.
When you are drivin' with drugs in your car, specifically weed, pot, marajuana, in the car either hidden away in the glove box or out and blazed up in the driver seat.
Man, put that shit out, Don't let them catch us ridin' dirty.

Stop looking mad shady or thay'll know we ridin' dirty.
by professor Quinta August 16, 2006
 
7.
To have sex in the anal reverse cowboy position.
That bitch last night was ridin' dirty; shit was off the hook.
by dirty_rider_69 October 27, 2011