This is when a girl has dirty panties on while wearing a skirt. She could be wearing a short or long skirt, it could be revealing as well, the key is the state of the underwear that she would be wearing.
“Man, I saw up that girl’s skirt and it was awesome till I realized that she was ridin dirty.”
by DragoTPE May 12, 2011
The act of walking around town with poopy time in your pants.
"Do you smell that? I think Marni must be ridin' dirty again."
by dirtypants August 05, 2008
When your girl takes a stank shit without you knowing and then rides you during sexual intercourse.
1. Ooh baby that feel good...damn what's that smell? You ridin dirty? Nasty bitch!

2. Man I was getting with Tiffany the other night and it was all good until she got on top and I smelled somethin evil. That bitch was ridin dirty!
by JSnoop January 06, 2011
Driving while thinking of explicite sex acts to be performed on the person next to you or someone you might see!; driving with a dirty mind; walking around with a dirty mind.
I can't wait get him home and unzip those pants! I am so Ridin' Dirty!
by Wendynj March 25, 2007
The act of having sexual intercourse with a women who is on top and has a stank vagina.
I was ridin' dirty with the drunk girl I took home from the bar last night.
by me46 March 22, 2007
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