The sound made during sexual intercourse, in the "doggy style" position, as the testicles of the male smack against the vagina of the female with the thrusting motion. The "rod" or "penis" is "knocking" or "pounding" the interior of the vagina.

the thing that you don’t have when you’re phones percentage is over 20

Compound word used to describe promiscuous girlfriends who cheated on their man because she's had so much wear and tear that she won't even be able to pair bond with one man anymore.