Preferably the youngest member of a friend group, or one who acts the youngest. Used as a joking insult between friends and can be used as an insult to someone immature or inexperienced
In comparison to what an uncooked chicken looks like lying on the counter before it is cooked for dinner. A Big bulbous body with little arms, big thighs and the skin full of tiny goosebump-like pours where all of it's feathers have been plucked from.
Man, I got so drunk that night that I setted for an uncooked chicken!