Most commonly refers to a bed, but sometimes to a sleeping bag. A private place for a good spank of the monkey.
Get out yer feckin wanksack! It's almost midday!
by Pete April 22, 2006
This is a slang word for the testicles
Man, my wanksack's bursting - i need a shag!!!!
by boho chick March 16, 2005