SUPERCILIOUS

adj. haughty, contemptuous, superior, snobbish, disdainful, arrogant, condescending, patronizing, overbearing, scornful, lordly, high and mighty, pompous, lofty, stuffy, pretentious, Colloq hoity-toity, highfalutin or hifalutin, uppity, snooty, stuck-up, Brit toffee-nosed, uppish, la-di-da or lah-di-dah or la-de-da She was very supercilious towards her customers