Is ain't a word?
Yes but it is not standard English.
Not a word to put in an essay, it's slang.
It's slang. So it's kind of a word...
i guess..coz it's too short to be a sentence...:P
Ain't ain't a word
Yes but it's improper grammer.
Yep! But not proper
it is a colloquialism, which means people in different areas may consider it a word or not or use it often . . . or not