The act of male testicles slapping their partners ass during sex. The best way to determine the "core"ness of sex is by how hard the males testicles are slapping their partners ass.
by AK_32 October 20, 2013
When a man has a hole in his underwear. You slap his ass pull up his penis and his balls fall through the hole.
The slap-ass gum-ball machine: John sees Spencers underwear has a hole in them . “John slapped his ass, pulled his Willy wiener, and his balls fell out.” I just did the slapp-ass gum-ball machine you. You’re dog water.
by Kentucky kfc January 28, 2022