American Idioms – Idiom Wizard Lists Over 5,500 Idioms & Slang Descriptions

Rabbit test


(Old fashioned) Proof of pregnancy. Decades ago a pregnancy test was made on a live rabbit, and if it died the female was pregnant. Thankfully that test is no longer used, but the idiom refers to a test of a process, idea or invention. Also used as ‘the rabbit died’ implying pregnancy. Yikes.

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