A fork of Rural Dictionary
The caveman is when a girl is dancing in a club and you're just gonna come up from behind and rub your pelvis against her ass, hope that something good is happening. This approach rarely works on girls in a club.
Me: Dude, you saw the guy doing the caveman to that girl? Homie: Ye, she was not amused and left the dancefloor. Cringe asf!