Green’s Dictionary of Slang

snow v.

also snow under, snow up
[fig. uses of SE snow]

1. (US) to confuse with a deluge of smooth, if insincere, talk; thus snowed adj., confused with such talk.

[US]‘Mark Twain’ Tom Sawyer, Detective 51: But she busted in on him there and just piled into him and snowed him under.
[US]Ade ‘The Fable of the Taxpayers Friend’ True Bills 123: About 10 P.M. the Benefactor who had drawn Pictures of himself sitting in the Leather Chair learned that he had been snowed good and proper.
[Aus]Bulletin (Sydney) 6 Aug. 11/1: Plainly, Pook didn’t know London. London fell on him and snowed him up. His fame got there ahead of him, and he found an avalanche of begging letters awaiting him.
[US]‘Bill O. Lading’ You Chirped a Chinful!! n.p.: Snow me: Tell me something cheerful even if untrue.
[US]J. Jones From Here to Eternity (1998) 29: You cant snow an old bull like him with promises.
[US]H. Ellison Rockabilly (1963) 96: You ain’t sharp enough, Shel-baby, to know when someone’s snowin’ the ass off you.
[US]H. Selby Jr Last Exit to Brooklyn 28: Georgette was smart and could snow them under with words.
[US]E. Torres After Hours 7: My lawyer, Jacobs, tries to snow me.
[UK]A-Team Storybook 6: Don’t try to snow me, Face Man.
[US]W.T. Vollmann Whores for Gloria 87: He kept the conversation going like he was a real nice guy. He really snowed me.
[Can]Ottawa Sun 11 Feb. 14: Knowing they would be hammered with questions about where the supposedly missing money went, they’ve responded with a vengeance. They’re snowing us under with information.
[UK]G. Iles Turning Angel 130: I used to think he was fun. He had me snowed like the rest. Not now, though. I saw through him.
[US](con. 1960s) J. Ellroy Blood’s a Rover 17: The PD fabricated some evidence and snowed the grand jury.

2. (Aus. drugs) to inhale cocaine.

[Aus]Truth (Brisbane) 22 June 12/5: ‘Cocaine may be taken hypodermically or by “sniffing” or “snowing,” as it is called’.