fanny rat

a person who is keen to get his hands, tongue, knob etc into a nice bit of beaver at every and any opportunity

Look at him! he's right into her pisher like a fanny rat

by Big Assed Ray February 4, 2006

fanny rat

an un-used tampon

"Ahh gash, the painters are in, anyone got a spare fanny rat?"

by a joker April 7, 2009