noun
useless person; poop-producing machine
Slang, derogatory, and jocular. Literally 'poop-producing machine', used to insult someone as contributing nothing to society. Strongly vulgar and offensive.
あいつは何もしないで、ただのうんこ製造機だ。
That guy does nothing; he's just a poop-producing machine.
ネットで「うんこ製造機」って書いてあるのを見た。
I saw someone called a 'poop-producing machine' online.