A wishwich is a desperate attempt at a sandwich when you have a loaf of bread but the fridge is empty of everything but condiments (mayo/mustard/ketchup/relish/pickles) and you are too broke to go buy food.
A badass bird of prey, well known for its ability to ride the wind like a bitch outta hell. If the term is a compound of wind + bitch it may preserve an old sense of bitch (“to be totally badass”)