iceman

noun7

1. •
   An ancient human male mummified in ice.
2. •
   (historical) A person who trades in ice; a person employed to deliver block ice to those lacking electric refrigeration.
3. •
   (slang) One who is cool under pressure.

   • Baltiel had always been the iceman, harsh and distant and lacking in sentiment. — 2019
4. •
   (slang) An assassin.
5. •
   A human figure carved out of ice.
6. •
   A man who is skilled in travelling upon ice, as among glaciers.

   • We were accompanied by our two guides, Jean Baptiste Croz and Michel Croz, of Chamounix, two capital icemen, and worthy fellows. — 1862
7. •
   (old-fashioned) A man in attendance at a frozen pond where skating etc. is going on.