bo [ bōh ] Share definition Flag 1 . abbreviation for boyfriend 2 . close friend "Oh yeah, my bo bōh and I are going out tonight" "Sup, bo bōh !" bo [ bōh ] by blanketyisfun January 27, 2010 0 0 Get merch Get the bo [ bōh ] mug. Buy Now — $32.95 See more merch