Boboseyo Share definition Flag Polite way to say to say BJ. If you are speaking to someone older than you or higher status you must say "boboseyo" in place of bobo when referring to female on male oral sex. Hey hyung, guess what that girl did for me last night?What that?BoboSEYO!! Boboseyo by Tikytok January 1, 2011 0 0 Get merch Get the Boboseyo mug. Buy Now — $32.95 See more merch