carnal Share definition Flag Mexican slang for "bro" or "my brother" just as Blacks use it to refer to someone who they feel a kinship to but not necessarely family. Hey CARNAL lets crash that quinceañera and see whats up. carnal by screwyloui October 23, 2006 0 0 Get merch Get the carnal mug. Buy Now — $32.95 See more merch