Meaning childish adult person is from c.1600. Meaning youngest of a group is from 1897. As a term of endearment for one's lover it is attested perhaps as early as 1839, certainly by 1901; its popularity perhaps boosted by baby vamp a popular girl, student slang from c.1922. As an adjective, by 1750.
http://www.dictionary.com/browse/baby
Definition 5b is used by a man or woman to refer to a sweetheart. Definition 5c is an affectionate term of address. However, when used in the workplace or in social interactions with strangers, it is sometimes perceived as insulting.
http://www.thefreedictionary.com/baby
Hello baby girl. Babygirl, let's not move there. Too much gang activity. Person 1: I love you baby girl. Person 2: I love you too, babe. See more words with the same meaning: boyfriend, girlfriend, boo, significant other. Last edited on Jan 11 2015.
http://onlineslangdictionary.com/meaning-definition-of/babygirl
Definition of baby. 1  1 : of, relating to, or being an extremely young child a baby bonnet. 2  2 : much smaller than the usual baby carrots a baby grand piano Take baby steps.
https://www.merriam-webster.com/dictionary/baby
a. a newborn or recently born child; infant. b. (as modifier): baby food. 2. (Anatomy) an unborn child; fetus. 3. the youngest or smallest of a family or group.
http://www.thefreedictionary.com/baby
(beɪb) n. 1. a baby. 2. informal a naive, gullible, or unsuspecting person (often in the phrase a babe in arms) 3. informal a young woman or man perceived as being sexually attractive.
http://www.thefreedictionary.com/babe
6. slang a young woman or sweetheart: often used as a term of address expressing affection. 7. a project of personal concern. 8. be left holding the baby to be left with the responsibility. 9. throw the baby out with the bath water to lose the essential element by indiscriminate rejection.
http://www.thefreedictionary.com/baby
A man who acts like a baby. If he doesn't get his way, he becomes crabby and unable to work with. thinks he's always right. Can be angered and upset by anything. Must proceed with caution! If you come into contact with a Manbaby, back away quickly and run like hell. Manbaby's are good at concealing themselves amongst society.
http://www.urbandictionary.com/define.php?term=Manbaby
a person of whom one is deeply fond; sweetheart. (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). a man or boy; chap; fellow: He's a tough baby to have to deal with.
http://www.dictionary.com/browse/baby
(beɪb) n. 1. a baby or small child. 2. an inexperienced or naive person. 3. Slang. a. Sometimes Disparaging and Offensive. a girl or woman. b. (sometimes cap.) an affectionate or familiar term of address.
http://www.thefreedictionary.com/babe
define man baby
An inexperienced person is defined as man's baby. A manbaby is defined as an inexperienced or naive person. A man baby is defined as an inexperienced or naive person.