Guinea-pig meaning

What does the saying 'Guinea-pig' mean?

Idiom: Guinea-pig

Meaning:

If you are a guinea-pig, you take part in an experiment of some sort and are used in the testing.
Country: International English | Subject Area: Animals | Usage Type: Both or All Words Used
All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.
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