Jo·nah n. The Hebrew prophet, who was cast overboard as one who endangered the ship; hence, any person whose presence is unpropitious.
Jonah crab Zool., a large crab (Cancer borealis) of the eastern coast of the United States, sometimes found between tides, but usually in deep water.
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Jonah crab
n : large red deep-water crab of the eastern coast of North
America [syn: Cancer borealis]