Green’s Dictionary of Slang

(orig. US) a biography; also attrib.

1938		W. Winchell On Broadway 30 Aug. [synd. col.] Trotsky wants to use the public library to finish his biog on Stalin.
1941		C. Sandburg letter Mar. in Mitgang (1968) 400: Ain’t writing no biog of anybody.
1968		K. Amis letter 19 Aug. in Leader (2000) 700: Even the biog. note is entirely accurate.
1983		K. Hudson Dict. of the Teenage Revolution 15: The staff of The Times Literary Supplement would be most unlikely [...] to refer to a new ‘biog’ of the Pope or Earl Mountbatten.
2000		Observer Screen 23 Jan. 9: A thick document containing detailed biogs of every current character.