ape shit 18 Share definition Flag back in the day it was sweet 16 now it's ape shit 18 hey ders a lousy sweet 16 going on but down at the 21 and over club der having a ape shit 18 ape shit 18 by ~B EZZ~ February 4, 2009 0 0 Get merch Get the ape shit 18 mug. Buy Now — $32.95 See more merch