The bit of hair that goes from your balls (testicles) up to and around your belly button, like a snails trail of hair
"did you see daves belly, it looks like his wankers tash goes from his balls to his chin!"
by Littlebilly April 27, 2007
also known as crab ladder, the hair below the naval leading down to the pubic region.
Fucking Hell! Your Wankers Tash is like a monkeys arm
by Escalations Moose February 28, 2007