Stop!, Don't touch that!

do not (negative auxiliary) / (nonstandard) does not / (African-American Vernacular) Used before an emphatic negative subject.

Something that must not be done (usually in the phrase dos and don'ts).

plural of don't

Alternative spelling of don'ts plural of don't

Full name of the U.S. Military's "don't ask, don't tell" policy concerning the service of homosexuals in the military as defined in 10 USC § 654.

(US) A policy of the U.S. military from 1993 to 2011, which barred openly gay, lesbian, or bisexual people from serving in the military, while also barring discrimination against closeted gays, lesbians, and bisexuals.

(informal) Used to say that something is too strange, embarrassing, or complicated to explain.

(social media) A demand for no debate regarding a controversial statement.

(idiomatic, informal) Do not broach that topic.