The word ain't is a contraction for am not, is not, are not, has not, and have not in the common English language vernacular.
The usage of ain't remains being a subject of controversy in English. Ain't is typically used by several speakers in oral and informal settings, especially in certain regions and dialects.
The real beginnings of the word ain’t cannot be defined exactly. However, linguists have been able to trace the word back to a certain extent. The contraction seems to have stemmed from amn’t, which combines the words am and not into a somewhat difficult result. This form, according to Merriam-Webster.com, was created in 1618 and is generally linked with Scottish and Irish speakers. So that, Amn't as a contraction of am not is known from 1618.
