IBLH Share definition Flag IBLH. Stand's for I Be Laughing Hard. Another version of lmao, lol, rofl but just used for more emphasis. Mostly used online chat rooms forums etc. Guy 1 : Oh man I heard that girl sing online! IBLH!! Guy 2: IBLH too man!! IBLH by duckinit12 September 22, 2010 0 0 Get merch Get the IBLH mug. Buy Now — $32.95 See more merch
