tinman

noun4

1. •
   A maker of tinware; a tinsmith.

   • But if there are gipsies or tinmen about we shall have to keep our eyes open after anything they can lay their hands on. — 1934
2. •
   A dealer in tinware.
3. •
   An uncaring or heartless man; a man lacking, or seeming to lack, feelings, emotions, or concern for others.
4. •
   A master gene in the fruit fly Drosophila melanogaster, whose absence causes the fly to develop without a heart.