plap /plæp/noun 2verb 2forms 3 noun2 •The sound of plapping or a plash. •(Internet) The sound of the tissue of two people clapping against each other, particularly of the buttocks or hips, by a single intense thrust of penetrative sex. verb2 •To plash; fall with a plashing sound.On this day it was so cold that the white bears winked their pink eyes, as they plapped up and down by their pool, and seemed to say, " Aha, this weather reminds us of dear home! — 1859 •(Internet) To have sex, to fuck. formsplapped · plapping · plaps