Caveman

[exinilu]

When a girl is blowing a guy with a [big cock], and the guy pulls away and swings his prized manhood back and forth while [whipping] his chick across her head with his big erect cock...like a [caveman] does to his woman when he hits her across her head with his big club.
To caveman a bitch is to club her with your huge cock.

[Magaret]

A prehistoric man who lived in caves.