Affecting white middle-class values, especially characterized by an air of superiority; conceited, ‘stuck-up’.
1940s. Origin uncertain; perhaps an alteration of sedate.
“They’re a saditty bunch and I hate spending time there!”
Insolence or arrogance in attitude or tone; cheekiness; forwardness; an instance of this.
Mid 16th century; earliest use found in Wilfrid Holme (d. 1538), author. From (i) Middle French procacité and its etymon (ii) classical Latin procācitāt-, procācitās forwardness, impudence from procāc-, procāx forward, bold, impudent, frivolous + -itās.