Synonym of know-it-all, an obnoxious clever person or a person making obnoxious efforts to seem clever.
An insolent person, especially one who makes snide remarks.
To talk like a smartass, with a lot of snide remarks.
Related to or characteristic of a smartass.
One who feigns knowledge or cleverness; one who is wisecracking; an insolent upstart.
To act like a wiseacre; to wisecrack.