The action of striking one's own knee with the hand, associated with hearty laughter.

(dated) In a kneeling position. / (by extension) Supplicatingly, imploringly.

plural of knee slapper

plural of knee-slapper

plural of knee-cap (alternative spelling of kneecaps).

plural of knee roll

plural of knee jerk

(martial arts) A strike performed by jumping forward and hitting the opponent with the knee.

A woody projection forming above the roots of certain cypress species, perhaps to aid in oxygenation to the roots or to anchor the tree in soft, muddy soil.

(idiomatic) To submit to another's authority.