MIF Share definition Flag a MIF is a MILF without the L. In other words, a mom that I fucked. charlie: Damn look at Michele's mom she is such a MILF! Me: Nah, she's a MIF on my list. MIF by osco50 March 14, 2008 0 0 Get merch Get the MIF mug. Buy Now — $32.95 See more merch