A sex toy, often explicitly phallic in appearance, intended for bodily interaction during masturbation or sexual intercourse. It is more commonly known as dildo.
"Where's my electric banana."
"I don't know."
"Sure you don't."
"What is that meant to mean."
"It means you do not have an electric banana. It means you're desperate. It means you can't get a man to put his cock in your pussy."
"For your information I have been screwing your boyfriend every night this month."