thighbrush Share definition Flag A thighbrush is a euphamism for a man's facial hair (or beard) with the subtle reference to performing oral sex on a partner. She said, "I'd love to have your thighbrush in between my legs." thighbrush by THIGHBRUSH November 3, 2017 0 0 Get merch Get the thighbrush mug. Buy Now β $32.95 See more merch