A guinea pig or cavy, particularly in informal or colloquial speech, or possibly a variant of cuve.
Possibly from Spanish 'cuy' (guinea pig), or an informal variant of 'cavy,' though some sources suggest it may relate to 'cuve' in winemaking contexts.
If it means guinea pig, the Spanish connection is fascinating—the Andes people domesticated wild cavies thousands of years ago and still eat them as a delicacy.
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