Definitions of crawfish:

• noun:   small freshwater decapod crustacean that resembles a lobster
• noun:   tiny lobster-like crustaceans usually boiled briefly
• noun:   large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
• verb:   make a retreat from an earlier commitment or activity

  Example: "We'll have to crawfish out from meeting with him"