Genital clapping

The clapping of genitalia in a heterosexual relationship, is usually referred to the physical activity of sex. The male penis being inserted into the women's vagina, then thrusting. The action is metaphorized as a clap.

Boy1: "Hey bro, what's up"
Boy2: "Nothing much, just tired"
Boy1: "why?"
Boy2: "Me and my babe were genital clapping all night"