materino Share definition Flag British slang; combining the word "mate" and adding "erino" to it. Only to be used ironically, coined by Daniel Howell. Pronounced mate-er-een-o Hey, will you hand me that? Sure will materino. materino by weslee b April 21, 2018 0 0 Get merch Get the materino mug. Buy Now — $32.95 See more merch