slang contraction of is not, are not, am not, do not or does not.
He ain't lazy, he just ain't got nothing to do.
by superrockstar125 February 11, 2003
informal language;teachers hate it;used in texting,talking
Ain't nobody got time for that.
She ain't listening to you
Why ain't anybody texting me today
by Iisreallystupid101 November 1, 2015
am not, are not, is not; have not, has not; do not, does not, did not.
"Ain't" ain't a word 'cause "ain't" ain't in the dictionary.
by Grinning Cat January 8, 2013
Contraction of am not and slang contraction for anything else.
I ain't gonna watch Joe Millionare 2 because it ain't good.
by Chase November 11, 2003
Originally a non-slang word, ain't began as a contraction for "am not", as in "I ain't stupid." When people began to use it improperly as in "He ain't", which should have been "He isn't", people came to consider it improper use of language. Today, it's known to be used predominantly in the south and by uneducated people.
I ain't yo' momma.

He ain't goin' to eat those nasty baked beans.
by Pitoyable May 3, 2005
Short for "am not" and for nothing else – not even "is not", for "it ain't" would just be "it am not". The only correct use is "I ain't" which is a contraction of "I am not". So, don't say e.g. "you ain't" which would only mean "you am not".
Clinique: "Let 'im go, he didn't do nothing!"
TyRone: "I ain't done nothing! I ain't done no nothing!"
LaKeisha: "You bastards, let us go! I ain't done none!"
Barackeisha: "You let 'em go!! They's ain't have done nothing! They ain't have done none!"
by Burt Milhorse Eriksson April 11, 2021
I ain't doing nothin!
by goduke3435 January 24, 2009