YWHNB Share definition Flag acronym for "yes we have no bananas" which is inexplicably included in many older versions of "txtronyms." Jessi: "lol i'm ooto u outta bananas?" Colleen: "ywhnb, plz pik some up!" YWHNB by aj2812 February 11, 2010 0 0 Get merch Get the YWHNB mug. Buy Now — $32.95 See more merch