Although normally used for consumption, the Chicken Leg is implied as a weapon in the 2011 set Blacksmith Shop. Though it probably wouldn't be too effective in a fight, it is a delicious snack that the toughest of Sky Pirates couldn't deny. You can use this weapon, but it will get sliced. That, on the bright side, will lead to sliced chicken, which is a widely enjoyed dish.
There are also more food weapons:
Astro Plants · Banana · Cake · Chicken Leg · Condensed Evil · Couch Potatoes · Fortune Cookies · Ice Berries · Ice Cream · Inky Lemonberry · Ninja Acorns · Ninja Bananas · Ninja Carrots · Puffy Potsticker · Resurrectea · Sausage · Snogfruit Punch · Space Lichen · Tea · Violet Berry Soup