Fanny Bash Share definition Flag Where 2 women rub and hit eachothers fannys together, usually after they lick eachother out. my girlfriend fanny bashed me yesterday it was great the way our fannys touched, i was screaming harder faster. Fanny Bash by proud owner of a fanny May 23, 2006 0 0 Get merch Get the Fanny Bash mug. Buy Now — $32.95 See more merch