Melt butter in a large skillet over medium heat. Add half of the green onions, and cook until wilted. Add crawfish tails, reduce heat to medium-low, and simmer for about 10 minutes. Set aside to cool.

In a large bowl, stir together cream cheese and mayonnaise until well blended. I like to use an electric mixer. Season with hot pepper sauce and Worcestershire sauce until the mixture is pink in color. When the crawfish have cooled slightly, stir into the dip along with butter and the rest of the green onion. Mix well, cover, and refrigerate overnight to properly blend the flavors.