1 definition by gangsta ass pepsi hater

Knee fuck

when someone (preferbly female) bends their knee forming a crease between the thigh and calf, the penis is then inserted inside this crease. you then hump it rythmycally until a climax is reached

she was too tired for me to fuck her normally so i knee fucked her, damn it was so good

by gangsta ass pepsi hater May 10, 2004