phr. & comp. abb. establish and maintain surveillance [for someone]. (A police notation.) : BOLO for a 65-year-old woman with tattoos on her upper arms. , We'll be on the look out for your stolen car.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
Bolo
"traitor," 1917, from Paul Bolo, Fr. adventurer shot for treason April 17, 1918; used in World War I with reference to pacifist propagandists; later somewhat assimilated to Bolshevik (q.v.).