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.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug