Debbie Wolowitz

Howard's mother. She is not seen on-screen but her voice is heard when he is at their house or when he talks to her on the phone. She talks to Howard by always yelling at him, which results in awkward long-distance conversations with him yelling back at her. Mrs. Wolowitz seems to be totally oblivious about Howard's work as an engineer, and talks to him like he was still a child. She makes his life miserable at home which prompts him to call her a "crazy old lady".