dirty carpool 

a term that was made up by Hooman on the show Weeds season 6 episode 11 used to describe something that happened on the dance floor by 3 girls as a result of the "leg spreader" the term given to the alcoholic energy drink with hash that Andy makes and Nancy sells.

3 chicks just did a dirty carpool...right in the middle of the dance floor!!

dirty carpool by Binxter November 5, 2010

Dirty Carpool 

When two girls with short skirts and no underwear are giving each other a piggy back ride. Usually performed on a dance floor.

Did you see those two girls doing a Dirty Carpool on the dance floor?

Dirty Carpool by Dirty White Panda November 3, 2010

dirty carpool 

The act whereby a male sexually pleases as many women as he can using all extremities. This occurs with the male lying down and preforming cunnilingus on a first girl while engaging in vaginal intercourse with another all the while fingering two different girls with each hand on either side of him.

4 girls, one guy, how can it be done?...with a dirty carpool, what else?

dirty carpool by prince of prosciut' November 18, 2010

Dirty Carpool 

While on the dance floor three or more people line up and run a sex train, can be vaginal, anal and/or oral.

DUDE! Three chicks just did a dirty carpool right in the middle of the dance floor!

Dirty Carpool by J and J Weiners November 3, 2010