Snooker, a newly joined cadet student of the fourth class

A DICTIONARY SLANG, JARGON & CANT OF EMBRACING ENGLISH, AMERICAN, AND ANGLO-INDIAN SLANG, PIDGIN ENGLISH, TINKERS’ JARGON AND OTHER IRREGULAR PHRASEOLOGY, COMPILED AND EDITED BY ALBERT BARRÈRE, Officier de l’instruction publique; Professor R.M.A. Woolwich, Author of “Argot and Slang,” &c. &c. AND CHARLES G. LELAND, M.A., HON. F.R.S.L., Author of “The Breitmann Ballads”, “The English Gypsies and their Language,” &c., VOL. II. L- Z., 1890, P. 270

Snooker (Royal Military Academy), a newly joined cadet student of the fourth class. Possibly from to snook, to lean the head forward in walking, in allusion to awkwardness in drill.