Used profanely (chiefly in optative, and often with no subject expressed) in imprecations and exclamations, expressing emphatic objurgation or…

In profane use. as an imprecation, or exclamation of emphatic objurgation.

int. ‘Damn me!’, used as a profane imprecation.

transitive and intransitive. In profane use: ‘confound’; = damn, v. 6.

In predicative use or as past participle: damned (see damn, v. 6).

by darn, used as a form of asseveration. Also not to care a darn or not to give a darn, not to care at all.

As an expression of surprise, impatience, etc.: ‘damn!’, ‘damn it’.

Used in comparative phrases.

An intensified form of: ‘damn!’; expressing anger, alarm, excitement, etc.

Expressing frustration, regret, or annoyance: ‘damn’, ‘blast’. Also expressing disbelief or dismissal (of a statement, idea, etc.): ‘nonsense’…

Damn it! used as an imprecation.