dirty knees 

Clear evidence of performing fellatio.

When they came out of the bathroom her hair was mussed; she might as well have had dirty knees.

dirty knees by tman March 11, 2004

Dirty knees 

When things get a little hot and she needs to suck on a popsicle

Yo she got dirty knees last night

Bruh last night she got really bad dirty knees

Dirty knees by D-Monkey February 26, 2018

Dirty Knees 

To Suck someones penis, while on your knee

yo, she be getting her knees dirty.

Yo she got dirty knees.

Dirty Knees by kibblasona January 6, 2006

dirty knees 

a girl that oral sex to a guy

yo, she got dirty knees!

dirty knees by CivicChikk July 24, 2003

dirty knees 

(noun)
when a girl gives a boy head in a porta-potty, which results in her knees being covered in fecal material or piss. Once the man blows a load, and they clean up, the girl needs to use soap and water before her knees are to the original skin color.

Samantha has some dirty knees after the porta-potty incident.

dirty knees by jacobito May 28, 2007

getting your knees dirty 

anyone who gets on their knees to preform oral sex on a male

yo you been around the block. you be getting your knees dirty.

getting your knees dirty by Tazmanian devil May 27, 2006

getting they're knees dirty 

a female most likey a hoe whos on her knees all the time sucking dick

Shanise and Sharounda are the girls u need to be talking to ,they be getting they're knees dirty every night.

getting they're knees dirty by Cece and Coco July 6, 2006