Hamnette Share definition Flag An abnormally small penis; diminutive of 'HamptonWick', cockney rhyming slang for prick. An aLlernative spelling is Hamnett. Arnold bought a Humvee to compensate for his hamnette Hamnette by Seaford Sam June 24, 2004 0 0 Get merch Get the Hamnette mug. Buy Now — $32.95 See more merch