Billingsgate Sasquatch 

Isn't it that one guy that played Sherlock Holmes?

Friend 1: Have you seen the new Sherlock TV show?
Friend 2: You mean the one with Billingsgate Sasquatch?
Friend 1: Yeah that one!

Billingsgate Sasquatch by Fugginballsnibba January 6, 2020

billingsgate sasquatch 

euph; anything that is large, greasy, covered in hair and reeks of fish.

when little miss muffet showed me her tuffet, i didn't expect it to be the billingsgate sasquatch.

billingsgate sasquatch by Max Biggins May 3, 2006