What is the meaning of Crawfish?

Any of various freshwater crustaceans: crayfish.

Any of various marine crustaceans, rock lobster; especially Jasus lalandii, the Cape crawfish.

A slur against English-Canadians used in some corners of Quebec (including the Gaspé).

To fish for crawfish.

To backpedal, desert or withdraw (also used with out).

Source: wiktionary.org