When having sexual intercourse and you hear the clapping sound of two persons thighs smacking each other; another word for sex derived from the south; sexual intercourse.
ex 1: "Dang dog, me and my homie James about to go klahp these two girls straight from the back."
ex2: "Yo I just heard you klahpping in the other room."
ex2: "Yo I just heard you klahpping in the other room."
by Willie Fresh February 21, 2009