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guinea pig

Any tailless rodent of the genus , which have short ears and superficially resemble large hamsters.

ˈɡɪni pɪɡCurrent188 viewsLast reviewed Jun 29, 2026+ Add a definition
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Seen in the wild
10 citations · last seen May 2026

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#1·Apr 27, 2026

Any tailless rodent of the genus , which have short ears and superficially resemble large hamsters.

He became a human guinea pig and was paid by the company.
Origin: The origin of "guinea" in "guinea pig" is uncertain. One theory is that the animals, which are originally from South America, were brought to Europe by way of Guinea, leading people to think they had originated there. "Guinea" was also frequently used in English to refer generally to any far-off, unknown country, and so the name may simply be a colorful reference to the animal's foreignness. Others believe "guinea" may be an alteration of the word rabbit; guinea pigs were referred to as "pig coneys" in Edward Topsell's 1607 treatise on quadrupeds. It arose from the once extensive usage of g. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
Heard in the wild
  • “I mean, i was sure she was guilty, but if you can't trust a guinea pig, who can you trust??”

    — Bluesky· May 2026
  • “guinea pig dandelion crunchies”

    — Bluesky· May 2026
  • “The guinea pig nibble on the corner of mine makes it priceless”

    — Bluesky· May 2026
  • “Surely there's no difference these days? Especially now Online has been around so long. (I have greeted someone for the first time in person with enquiries as to the health of their guinea pig, which never used to be a conference ice breaker for me.)”

    — Bluesky· May 2026
  • “David Bowie called Iggy Pop a guinea pig. The drummer didn't know his takes were on the final record. And "Nightclubbing" exists because Iggy refused to use real drums. Five wild facts about 'The Idiot.' zurl.co/uNliQ”

    — Bluesky· May 2026
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#2·Apr 27, 2026

(dated, slang) A professional company director, without time or real qualifications for the duties.

My dad told me about his days in the Navy: He'd agreed to be a guinea pig in exchange for a shorter enlistment. They kept him awake for a week straight.
Heard in the wild
  • “Oxbow Animal Health Western Timothy Hay, Guinea Pig Hay, Small Pet Bunny Supplies, All Natural Grass for Guinea Pig, Bunny, Chinchilla & Hamster, Oxbow Rabbit Supplies for Bunnies, 90 oz. bag #Oxbow #Hamster #USA #SmallPet #TimothyHay”

    — Bluesky· May 2026
  • “If you buy a guinea pig from a pound shop, who owes who a shilling?”

    — Bluesky· May 2026
  • “Living World - Deluxe Hybrid Habitat, X-Large - Rabbit, Guinea Pig, Chinchillas, and Small Animal Cage #rabbitcage #ferretcage #animalhabitat”

    — Bluesky· May 2026
  • “Oxbow Animal Health Organic Meadow Rabbit Hay, Guinea Pig Hay, Small Pet Bunny Supplies, All Natural Grass for Guinea Pig, Bunny, Chinchilla & Hamster, Oxbow Rabbit Supplies for Bunnies, 15 oz bag #premiumhay #chinchillafood #smallpetfood #usa #oxbow #rabbitfood”

    — Bluesky· May 2026
  • “Oxbow Critical Care Herbivore, Fine Grind, Emergency Rabbit & Guinea Pig Food, Natural Papaya Flavor, Veterinary Formula, Critical Care Herbivore, Assist Feeding Formula for Pets, 100 gram bag #herbivorefood #powderedfood #veterinaryformula #recoveryfood #emergencyfood”

    — Bluesky· May 2026
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#3·Apr 27, 2026

(figuratively) A living experimental subject.

[H]e spoke of the unwisdom of volunteering one's services as a guinea pig.
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