 Ain 't as a contraction for has not / have not first appeared in dictionaries in the 1830s, and appeared in 1819 in Niles' Weekly Register: Strike! Why I ain 't got nobody here to strike .... Charles Dickens likewise used ain't to mean haven 't in Chapter 28 of Martin Chuzzlewit (1844): "You ain't got nothing to cry for, bless you! He's righter than a trivet!"
