Barney-mugging Share definition Flag Barney-mugging, is a slang word from the 1920's meaning SEX Yup, I was barney-mugging Ashley all night long baby! Whoooo!!! Barney-mugging by AlreadyDead June 20, 2007 0 0 Get merch Get the Barney-mugging mug. Buy Now — $32.95 See more merch