bumping knees

To be playful. But also can mean you have interests in that girl/boy.

Omg Susie was bumping knees today with Kyle does she like him?

by Calhoun11 January 5, 2016

Knee bumping

When a guy pretends to accidentally put his knee on your leg just to test to see if a woman is in to him.

Sarah: That guy at the bar kept knee bumping me.

Amanda: He is so testing to see if you will fuck him.

by OddGirlOut February 15, 2015