ABSTRACT
O. A tramp's sign for * No obstacles ; you may do pretty well here ' : 1888, James Greenwood, The Policeman's Lantern ; extant.—2. Opium : U.S. drug addicts' : 1934, Rose ; extant. Cf. C—H—-M—.—3. An ounce of narcotics : addicts' : 1942, BVB. Short for O.Z.
