silent boner Share definition Flag The feeling one gets when you feel a boner coming on in a crowded area, and become extremely shy and unable to speak. We were at the party and things were going well, but when the girls came over, we got silent boner. silent boner by Word Master Slappyhands June 1, 2016 0 0 Get merch Get the silent boner mug. Buy Now — $32.95 See more merch