1. Sometimes Disparaging and Offensive. a girl or woman, especially an attractive one.
2. a person of whom one is deeply fond; sweetheart.
3. ( sometimes initial capital letter ) an affectionate or familiar address (sometimes offensive when used to strangers, casual acquaintances, subordinates, etc. especially by a male to a female).
4. a man or boy; chap; fellow:

He's a tough baby to have to deal with.