HBDD Share definition Flag as a noun: describes one's significant other. IM-ese; short for Honey-Bunch Darling Dearest. Often used sarcastically. Coined by user Rome on www.someidiot.com in August, 2003. I wanted to buy a new boat, and HBDD was all for it, provided I move out with it. HBDD by Mike December 8, 2003 0 0 Get merch Get the HBDD mug. Buy Now — $32.95 See more merch