type-writer

noun4

1. •
   A device, at least partially mechanical, used to print text by pressing keys that cause type to be impressed through an inked ribbon onto paper.
2. •
   (slang, old-fashioned) A machine gun or submachine gun (from the noise it makes when firing).

   • The battle had opened in earnest. From the wooded ridge came in reply the clacking of "typewriters,” and bullets whined over our heads. — 1973
3. •
   A prank in which fingers are jabbed roughly onto someone's chest followed by striking them over the ear in imitation of using an old-fashioned typewriter.
4. •
   (no longer used) One who uses a typewriter; a typist.

   • So many mongrel words, like typist and typewritist, have been introduced, we propose a fixed designation of—typewriter, to mean the person who writes, and writing machine, the device. — 1894