GorillaMilkshake Share definition Flag 1. (n) a complete and utter retard 2. (adj) to do something completely retarded 1. man, he's such a GorillaMilkshake 2. well that was a GorillaMilkshake thing to do GorillaMilkshake by TheAmazingMonkey February 1, 2008 0 0 Get merch Get the GorillaMilkshake mug. Buy Now — $32.95 See more merch