Well, I had to look that one up. The Urban Dictionary says it’s a person who has sex with men, women, animals, or dead people/dead animals.
No words here....
I don’t know if that was the exact term and if that’s what he meant, but I’m pretty darned sure it was regarding 4 general ways. There’s a Beavis/Butthead video upthread where he looks like he’s getting aroused near some rocks. Maybe it’s men, women, rocks...still need #4.