Green’s Dictionary of Slang

1. (US drugs) the nose, in the context of sniffing narcotics; thus v. hoover, to inhale a narcotic (through a straw or rolled up note).

1988		H. Gould Double Bang 59: She had a Hoover like a tornado. She could stick the whole town of Cali up her nose, buildings and jeeps and all.
2004		L. Redhead Peepshow [ebook] I held the straw to my right nostril, blocked the left with my index finger, and hoovered away.

2. (US prison) aq menial, performing (humiliating) tasks for other prisoners.

2023

Rayman & Blau Riker’s 246: [If] you couldn’t fight, you’d have to actually wash other kids’ underwear and shit. Boy, you were a ‘Hoover,’ the shit stain remover.