don't

do not (negative auxiliary).

Don't you think mom's awfully busy today?

Don't be such a nuisance!

does not.

Blessed are the poor in spirit, saies he. Blessed are those that mourn. He don't say, Blessed are those that rejoyce; or, Blessed are those that have the Assurance of Gods love; or, Blessed are those that are strong in Grace: No, but doest thou know a poor weak, Christian, a mourning soul like a Dove of the Valleys; saies the Lord, I blesse him.

L. C. Baron. That don't alter the Pronunciation. It is the same Name.

Used before an emphatic negative subject.

Don’t nobody care.

Stop!

Chiefly in dos and don'ts: something that must or should not be done.

Among the don'ts he had done before he was twenty-one were peyote, alcohol, mescaline, and Methedrine.

And here’s one universal selfie don’t - if the setting is your bathroom, or any bathroom for that matter, it has no place in your Tinder lineup. Not hot.