Green’s Dictionary of Slang

(US/Aus.) to snub; to condescend to.

1928		E. Hatch Couple of Quick Ones 198: I followed him [...] up the street to where the Wright limousine was snooting the world in general at the kerb [OED].
1933		E. Hemingway letter 27 Feb. in Baker Sel. Letters (1981) 381: If I tell him your going and you cant and Mike wont (to snoot me probably because I delayed Africa trip) then Uncle Gus may not go either.
1942		W. Winchell On Broadway 8 Nov. [synd. col.] Frau Himmler gets snooted by the wives of Goebbels, Goering, et al, because her husband, Mr Gestapo, butchers people for a salary, while others do it for medals.
1949–51		in M. Daly Profile of Youth 119: The boys and girls with the highest school marks snoot the kids who get lower than B’s.
1952		K. Vonnegut ‘The Package’ in Bagombo Snuff Box (1999) 47: If this great Charley Freeman snooted you in the old days, I don’t see why we should have him in the house now.
1955		E. Hoagland Cat Man 162: ‘I don’t know a thing about the town,’ snooted the woman. ‘I don’t live here’.