Green’s Dictionary of Slang

1. (US drugs) a cocaine user.

1913		A.B. Reeve Constance Dunlap 299: She had heard before of the cocaine ‘snuffers’ who took a little of the deadly powder, placed it on the back of the hand, and inhaled it up the nose with a quick intake of breath.
1914		Detroit Free Press (MI) 26 Apr. 82/2: Some of the fellows I chummed with were ‘snuffers’.

2. (US black) the nose.

1912		Ade Knocking the Neighbors 211: She began working the Snuffer on all the Would-Bes.
1944		‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.