E.I.Y.C. Share definition Flag E.I.Y.C. is A slanderous term meaning 'Eat It You Cunt.' "Attention students, eat it you cunt(e.i.y.c.), thank you." E.I.Y.C. by Markie Werner January 13, 2008 0 0 Get merch Get the E.I.Y.C. mug. Buy Now — $32.95 See more merch