The piece of a bloke's anatomy that is between the base of his nut sack and his arsehole (biologically the perineum)
by dooferdog November 12, 2015

When one finds money once lost to their own idiocy. It is quite possible said individual never knew they had suffered the twat tax in the first place.
When you put on a pair of jeans not worn in six months and find a mashed up £20 note in the pocket. "Sweet! Twat tax rebate!"
by dooferdog March 21, 2017
