Mexrechaun Share definition Flag A Mexican Leprechaun. Searching for his pinata full of gold. A short Mexican wearing an abundance of green. "Make that Mexrechaun hold a nip of Jameson's in his hand and take a picture with him" Mexrechaun by loljesussss February 1, 2009 0 0 Get merch Get the Mexrechaun mug. Buy Now — $32.95 See more merch