Green’s Dictionary of Slang

(US Und.) to snub.

1921		O.O. McIntyre Bits of New York Life 6 June [synd. col.] More slang peculiar to New York. ‘He ritzed me!’ meaning that he gave her a haughty stare. ‘Pulling the old Plaza stuff!’ meaning the same thing.
1928		W. Winchell Your Broadway & Mine 10 Dec. [synd. col.] A prominently rich man who snubbed such celebs as Douglas Fairbanks [...] after they saluted him in the street. ‘Gee, but you can ritz big people, ’ sighed la Guinan.
1936		W.R. Burnett King Cole 118: Eileen hated Vince. Oh, didn’t she ritz him at Lamont Jones’s party though!
1943		I. Wolfert Tucker’s People (1944) 15: But if Mr Minch was going to make out like this, thought Candee, put on the dog and give him the ritz like this, make out he’s too good to cut a corner for a dollar, then what’s the use of giving away the information he had?