1. people who make smart-alecky or sarcastic remarks; know-it-alls who act in an annoying or disrespectful way
Usage: informal; mildly offensive

Examples

• The teacher had to deal with a few wiseasses who kept interrupting the lesson.
• Don’t be such wiseasses when your parents are trying to help you.
• The coach warned the team that wiseasses wouldn’t make it to the starting lineup.
• Those wiseasses in the back row think they know everything.
• She got tired of the wiseasses making jokes during the serious meeting.
• The principal called in the wiseasses who had been disrupting class all week.