To brake abruptly as the target of a high speed chase, as to force your pursuers to vastly overshoot you, ram one another, or collide with an oncoming object.
The phrase “Endor Brake” comes from a popular example of the manoeuvre’s use, in Star Wars Episode VI, Return of the Jedi.
“How did you escape the FBI so easily?”
“It was simple, I gave them the old Endor Brake Manoeuvre!”