wtfhax Share definition Flag What The Fuck Hacks. Used to express suprise, and to accuse someone of hacking (cheating), in an online game. He just pulled off a headshot from the other side of the map! WTFHAX! wtfhax by dz October 27, 2003 0 0 Get merch Get the wtfhax mug. Buy Now — $32.95 See more merch