i Register
In some senses, crawfish is marked as derogatory, slang, US, colloquial. Watch for register when choosing this word.
noun
Any of various freshwater crustaceans: crayfish.
Any of various marine crustaceans, rock lobster; especially Jasus lalandii, the Cape crawfish.
An English-Canadian. Used in some corners of Quebec (including the Gaspé).
verb
To fish for crawfish.
To backpedal, desert or withdraw (also used with out).
I have never been one to flinch or crawfish when faced with an unpleasant task.