No pain, no gain, no idea what half these terms mean.
A sharp, localized stabbing pain that hits under your ribcage during intense exercise—your body's way of reminding you that you're out of shape. Not to be confused with the sewing kind, though both are equally painful.
In motorsports, a tire compound softer than mediums but harder than supersofts—basically the Goldilocks of rubber that sacrifices longevity for grip. Drivers love it for qualifying laps; pit crews dread the mid-race pitstop it guarantees.