What does wise cracker mean in the outsider book?

The phrase "wise cracker" is used in the book "The Outsider" to describe a person who makes witty or humorous remarks, especially in a knowing or cynical manner. The book uses this term to refer to the character of Terry Maitland, who is known for his sharp wit and ability to make clever comments. It suggests that Maitland is someone who is intelligent and observant, and who is not afraid to speak his mind.