Slut Fly Share definition Flag A common name for “Drain Fly.” Often shortened to “slut” Goddamn slut fly OR I hate these fucking slut flies OR I’m going to go on a slut killing spree tonight Slut Fly by Babsillow December 6, 2020 0 0 Get merch Get the Slut Fly mug. Buy Now — $32.95 See more merch