poop machine

From the view that the subject (a baby or animal) does nothing but digest food and produce waste.

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poop machine (plural poop machines)

1. (informal, derogatory or humorous) An infant.
   • 2012, J. A. Pitts, Forged in Fire, Tor Books, →ISBN, page 147:

     […] Never could keep friends long, so I figured if I had a sister, I'd at least have someone to be friends with, even if she was a crying poop machine for the first year."

2. (idiomatic, derogatory or humorous) An animal whose defecation inconveniences humans.
   • 2000, Gerry Buccis, Barbara Somerville, Training Your Pet Rat, Barron's Educational Series, →ISBN, page 85:

     Then, there's scooping the poop. Rats are real little poop machines.

• For more quotations using this term, see Citations:poop machine.

• poop factory
• shit factory (vulgar)
• (infant): see also Thesaurus:baby.