Answer:
"ain't"
Literature as early as 1706 can be found using the word am’t or ain’t as a contraction for a variety of words such as: am not, are not, is not, has not, have not, did not and was not. At that time, “ain’t” was accepted in conversational verbiage of the upper class such as Victorian lords and ladies. Works of literature in the 1800s however, associated the term “ain’t” with the lower class so avoiding it’s usage would clear oneself of association with that class.
I personally don’t use the word and think others should not either. When “ain’t” is used as a substitute for a variety of words, it only caters to a lazy vernacular. I believe we need to take a firm stance on this junk-shop word and not allow its usage further.
Language experts have a love-hate relationship with this word. Perhaps it’s the one word (if you can rightfully call it a word) in the English language that carries with it the most stigmatism. While experts can’t deny that it’s the verb in a sentence, it can carry with it a lazy or a bullying effect in the way it’s used. Unpacking the contraction in a sentence doesn’t always make sense either. For example: he ain’t who you thought he was would translate into he am not the person...
Then again, in the love realm, there’s the familiar conversation where you blurt out “ain’t she cute!” for it seems to give a cozy, intimate effect.
Radio and TV personalities, the President and teachers generally avoid using the word “ain’t”, as saying it from a professional platform would be like giving permission for it to be spoken. This approach is correct as the audience is neither informal nor to be bullied. There are times I’ve heard my friends use “ain’t”, but it’s more as a term used for it’s effect rather than consistent loose language.
I think it’s important when addressing anyone in a formal setting that the the word “ain’t” is not used because of the example it sets forth. If “ain’t” is used in conversation, I believe it should take place only when the group is small and familiar
Explanation: This is my personal answer about the use of "ain't"