shaggy williams

To perform a rimjob on someone with an excessively hairy asscrack.

Jennifer: Last night's experimentation was not nearly as enjoyable as I'd been hoped.
Penelope: Why not? You're usually excited about trying new things in bed.
Jennifer: Yeah, but what I thought was going to be a normal rimjob ended up being a straight-up shaggy Williams. It was like rimming Bigfoot.