hotter than a pistol

adjective2

1. •
   Very hot.

   • "Warm day out there on the highway. . . . It's only June. By the Fourth it'll be hotter than a pistol around here." — 2008
2. •
   (US, Canada) Exceptionally popular, productive, or marketable.

   • "Carl Perkins and I were in Amory, Mississippi, with Elvis. Now Elvis, of course, was hotter than a pistol. He had his second record out." — 1988