[for someone] to be experimented on; to allow some sort of test to be performed on someone. • Try it on someone else! I don't want to serve as a guinea pig! • Jane agreed to serve as a guinea pig. She'll be the one to try out the new flavor of ice cream.
Guinea-pig
If you are a guinea-pig, you take part in an experiment of some sort and are used in the testing.
An Guinea idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with Guinea, allowing users to choose the best word for their specific context.
Dictionary of similar words, Different wording, Synonyms, Idioms for Idiom, Proverb Guinea