Miernifico Share definition Flag A combination of the spanish words mierda (shit) and magnifico (maginificient). A really unpleasent state of being. Phillip: Hi. How are you? Brian: Oh, I'm Miernifico... Miernifico by P.T. Thomas May 4, 2010 0 0 Get merch Get the Miernifico mug. Buy Now — $32.95 See more merch