smartass

noun

1. (mildly, vulgar)Synonym of know-it-all, an obnoxious clever person or a person making obnoxious efforts to seem clever by acting or behaving as if they know everything.
2. (mildly, vulgar)An insolent person, especially one who makes snide remarks.

   “Lots of luck, smartass.”

adj

1. (not-comparable, slang)Related to or characteristic of a smartass; irritatingly clever or smug.

   “I have had quite enough of your smartass remarks.”

   “"That is heresy!" Reb Shimon exclaimed, and then added, "Where do you get such smartass opinions?"”

verb

1. (slang)To talk like a smartass, with a lot of snide remarks.

   “I smartassed and smack-talked half of the interview, but as I relaxed a bit more and genuinely talked with them, a strange thing happened.”