A winged insect which buzzes around the house, infests the garbage, crawls on the food when you're not watching, and generally irritates the hell out of everyone. Even worse, they're hard to kill because they can usually fly off before you can swat them.

Also, a fishhook dressed with feathers, tinsel, or other stuff to make it look like an insect. Fish like to eat flies, but since it's difficult to stick a fly on a hook, it's easier to use an artificial one. You can buy flies in stores, but many fishermen prefer to make their own.