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1.
females (the gash refers to the hole in the southern regions of a woman). its a very insulting and crude way of talking about bitches
me and my mans are going out with some gash tonight
by raned December 04, 2003
 
2.
a woman with gonorrhea, aids, syphillis, and herpes
Mikey, that girl's got The G.A.S.H. She's gonna get real fat eatin' all them pizza and pancakes.
by Tom Jesus September 07, 2005