What it is

The fumblerooski was a trick play in which the quarterback pretended to hand off but actually left the ball on the ground, so a guard could pick it up and run.

In a game

While the defense chased the apparent ball carrier, a lineman grabbed the ball and ran toward the end zone.

More detail

The play is now illegal in many levels of play. It is remembered as one of the most famous trick plays in college football, and a reminder that the rules adapt to deceptive ideas.