Language/English/Vocabulary/Meaning-of-ain't

Originally "AIN'T" is a contraction of "are" and "not" - so "ain't" means "are not".

This is slang language and it's never used by those who speak English properly.

Examples:

• You ain't ... = You are not...
• You ain't going / You ain't goin' = Your are not going

Subsequently, "ain't " replaces all the declension of the verb "to be" in the present and the negative, as well as the verb "to have" in certain cases:

• I ain't... = I am not
• You ain't done it = You have not done it