killer kiddies Share definition Flag A child under the age of 12 who eats children in their sleep. 6 year old Danny says "Mommy check my closet for fother muckin killer kiddies! Yesterday Manny lost his middle leg!" killer kiddies by John Dopafine April 14, 2007 0 0 Get merch Get the killer kiddies mug. Buy Now — $32.95 See more merch