sled head

noun1

1. •
   (slang) A concussion or subconcussive injury caused by tobogganing, including luging, skeleton, bobsledding, tubing; that stereotypically leaves the victim woozy or muddle-headed.

   • “They would say, ‘I got a real sled head today,’” Morris said. Then they would go take another run, and several more the next day. “You get sucked into thinking it’s not a big deal.” — 2020