boo-yah
n.— «A favorite expression for killing someone these days is “boo-yah”—the sound from a sawed-off shotgun.» —“Whole sections of urban America are being written off as anarchic badlands, places where cops fear to go and acknowledge: ‘This is Beirut, U.S.A.’” by Thomas Moore, et al. U.S. News & World Report Apr. 10, 1989. (source: Double-Tongued Dictionary)