TLAO Share definition Flag Three Letter Acronym Overload (TLAO)Best applied after an exchange of Three Letter Acronyms (TLA's). Genius: FFS. Eejit: WTF. Genius: TLAO.Others: We applaud genius's epic pwnage of Eejit. TLAO by Milleria October 24, 2011 0 0 Get merch Get the TLAO mug. Buy Now — $32.95 See more merch