look up any word, like fleek:
A shaft bag is a condom, used to describe, in a more degrading way; tool bags, tools and douche's.
You see a guy with sunglasses on, at night, in the club with or without a blowout haircut... Shaft bag. The guy that runs on the beach and checks himself out mid-run... shaft bag.
by jnick89 June 05, 2013