Alternafrump Share definition Flag A woman or girl who aspires to dress, act, and think "hip", but ultimately comes off as being plain and frumpy. I went to this hipster bar in SouthEast that was crowded with alternafrumps. Alternafrump by jack saturday July 27, 2016 0 0 Get merch Get the Alternafrump mug. Buy Now — $32.95 See more merch