sewer pizza Share definition Flag A degrading term for an Italian, usually used to call one filthy, undesirable, lazy or stupid. Uh, that's just like a sewer pizza, smells like shit and can't even off of his couch to get a job! sewer pizza by The Iron Irish January 24, 2015 0 0 Get merch Get the sewer pizza mug. Buy Now — $32.95 See more merch