Gotchimatum Share definition Flag When someone plays a trick on someone else, particularly from a trusted elder to a younger child. "Oh man, our teacher Mr. Reese made us look up the definition for a made-up word!? Oh no, he's pulled such a great gotchimatum on us all!" Gotchimatum by Reesey21 March 4, 2025 0 0 Get merch Get the Gotchimatum mug. Buy Now — $32.95 See more merch