b-noch Share definition Flag Analogous to the phrase "g-night" which is short for "good night." This spanish expression is short for "buenas noches." Girl 1: "Hey, I'm gonna call it a night." Girl 2: "Alright, b-noch!" b-noch by P Rey December 19, 2011 0 0 Get merch Get the b-noch mug. Buy Now — $32.95 See more merch