Haughtily condescending, dismissive, or snobbish. I can't believe that snooty waiter scoffed at you for ordering red wine with fish.A: "Do you want to come to the gala with me?" B: "And spend the evening pretending to fit in with snooty socialites? No thanks."
snooty
mod. haughty; conceited. (As if looking down one’s nose = snoot, at someone. Alludes also to having one’s nose in the air meaning haughtiness.) Tiffany can be snooty if she wants to, and she usually wants to.