femboysatan Share definition Flag A young cosplayer on tiktok who doesn't know how to shut the fuck up. "hey have you heard of femboysatan?" "you mean the dude who can't shut up for once?" femboysatan by undinecosllays October 7, 2020 0 0 Get merch Get the femboysatan mug. Buy Now — $32.95 See more merch