THROW OUT OF GEAR

{v. phr.} 1. To separate the gears of (a car or some other machine) when you want to stop it. * /When John wanted to stop, he threw the car out of gear and braked sharply./ 2. To stop or bother (what someone is doing or planning); confuse; upset. * /The whole country was thrown out of gear by the assassination of the President./ * /My mother's illness threw my plans for the summer out of gear./