Peanut Butter Jelly Time originated with a flash animation that showed a Banana dancing wildy about the screen rapping the following lyrics: "Peanut Butter Jelly Time Peanut Butter Jelly Time(repeats several times), Peanut Butter Jelly with a baseball bat, Peanut Butter Jelly with a baseball bat."
peanut butter jelly time definition by Urban Dictionary