To move in a direction opposite to that which one is facing, keeping one's attention on the thing in front being avoided.
To backpedal, desert or withdraw (also used with out).
Various marine crustaceans, rock lobster; especially Jasus lalandii, the Cape crawfish.
Various freshwater crustaceans, crayfish.
A slur against Anglo-Canadians used in some corners of Quebec (including the Gaspé).