Nawmsayin Share definition Flag A shortened term for, "know what I'm sayin'?" Often used to enhance informal conversation. -I have to go fill a hole in my backyard. -I'll fill your hole in my backyard, nawmsayin'? Nawmsayin by Skelectory April 7, 2009 0 0 Get merch Get the Nawmsayin mug. Buy Now — $32.95 See more merch