cooter Share definition Flag 1: Female genitals. 2: A dim witted or stupid person hailing from a rural area. See: Redneck So I go to the store, and this dumb cooter was in line in front of me buying four cases of chewing tobacco. cooter by snabald July 13, 2003 0 0 Get merch Get the cooter mug. Buy Now — $32.95 See more merch