sweat hole

noun3

1. •
   A large hole in the ground, heated with a fire, into which a sick person is brought wrapped in blankets (once the fire is removed), with a jug of water for making steam, the whole covered by an awning to hold the steam in; an underground sweat lodge.

   • On the lake shore were some other camping places that had been used within a few months and at one of them a newly made "sweat hole" where the medicine man had treated the sick . — 1907
2. •
   An uncomfortably hot enclosed space.

   • As soon as the doctor testified that some blustery old politician was crazy, they could give the kid back and get the hell out of this sweat-hole. — 2013
3. •
   (nonstandard, rare) An opening in the skin through which sweat is excreted; pore.

   • Skin surface consists of four elements such as furrows, ridges, hair holes and sweat holes. — 2012