dabliu
Used to express stunning disbelief in a response, usually in place of phrases too long to be properly verbalized in the momentary astonishment.
Guy 1 (drunken): "Hey babe, wanna know why my friends call me 'tripod'?"
Girl 2 (in truth a guy): "Dabliu?! You serious, dude?"
Girl 2 (in truth a guy): "Dabliu?! You serious, dude?"