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Sadiddy (adjective)
alternative form of saditty
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Saditty (adjective)
Acting snobbish, arrogant, or superior; uppity; perceived to be trying to associate with a higher social class.
Wiktionary
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Saditty (adjective)
Affecting white middle-class values, especially characterized by an air of superiority; conceited, ‘stuck-up’.
Oxford Dictionary