S.W.I.S.H. Share definition Flag acronym meaning single women in support of homosexuals She might be a fag hag, I'd rather call her a S.W.I.S.H. S.W.I.S.H. by Fincher April 24, 2006 0 0 Get merch Get the S.W.I.S.H. mug. Buy Now — $32.95 See more merch