What is a flea flicker in football?

A flea flicker is a trick play in American football, typically used on passing plays, in which the quarterback hands the ball off to a running back who then tosses it back to the quarterback, who then passes the ball downfield. The play is designed to deceive the defense by appearing to be a running play, then suddenly transitioning to a pass, with the quarterback often throwing to a receiver who has gotten behind the defense. The flea flicker is considered a high-risk, high-reward play, as if the defense reads it properly, it can result in a turnover or a loss of yardage. However, if successful, it can result in a big gain or even a touchdown.