i beleive tim shaw uses the term 'gammon washer' as an alternative name for your bottom hole. Not, as the last entry seems to think, the vagina.
tim shaw's show is described as like turning yourself inside-out through your gammon washer
by pete June 18, 2006
1 more definition
A word used to describe a vagina on 'Tim Shaws Asylum' on Kerrang Radio.
'I put it right up her gammon washer'
by Dan Pearce June 10, 2005