Toxic Killua simps Share definition Flag A group of people on tiktok who simp over killua and oversexualize him, probably one of the most toxic group of kids on tiktok 😰👆 "Oh toxic Killua simps? Yeah I hate them" "Isn't he 14??" Toxic Killua simps by mitsubaporn March 5, 2021 Get the Toxic Killua simps mug.