The definition of a smart ass is a person who makes comments he thinks are clever or funny but which are usually unwanted or undesired by others.
An example of a smart ass is someone who always has to make sarcastic comments in answer to simple questions.
A smart aleck.
- Alternative spelling of smart ass.
(plural smart asses)
- (slang) A person regarded with an obnoxiously determined advancement of one's own personality, wishes, or views.