An exclamation used to punctuate boastful and often humorous descriptions of outlandishly violent or dominating acts. Was first popularized in the early 1990s by the Wu Tang Clan, most notably in the intro to the song "M.E.T.H.O.D. Man", in which members of the group cooked up imaginary schemes for extreme torture sometimes followed by the word "Blau!"
"I'll f***ing lay your n*** on a dresser, just your n*** see, and just bang them s**** with a spiked f****** bat! Blau!!!"