Gashhash 

a term used to comment poorly on the quality of hash

this is gashhash, i wouldn't even let your mom smoke it

Gashhash by jaffaw July 16, 2009

gashlash 

The injury sustained when turning ones head or body rapidly to observe a female.

Take a look at that totty over there, but mind you don't get gashlash.

My neck hurts after walking past all those hotties, I think I have a severe case of gashlash.

I spent the whole day meerkatting, and I have got gashlash.

gashlash by killban October 26, 2010

gashmash 

two girls scissoring themselves!

me and my bitch gashmashed for hours lastnight

gashmash by fritzinator March 16, 2009

gashtashtrophy 

Word used to describe a woman or a group of women who are particularly hideous looking.

Or to describe a drunk horny woman after a heavy night on the town.

Dude 1: Mate don't go in that night club, its an absolute gashtashtrophy in there.

Dude 2: Thanks for the heads up. Ill go somewhere else.

gashtashtrophy by The Gash Meister May 28, 2011