Bun-Boy Share definition Flag A person who has a soft body composition, has a weak chin, overly indulges in carbs, has passive body language, and overall lacks confidence. “Wow that man has an odd body shape.” “Oh that’s Joe, he’s a bun-boy.” Bun-Boy by anonymous November 14, 2020 0 0 Get merch Get the Bun-Boy mug. Buy Now — $32.95 See more merch