Definition & Meaning of "I'll be damned if"in English

What is the origin of the term "I'll be damned if" and how is it used?

"I'll be damned if" comes from the same roots as "I'll be damned," with "damn" entering English from religious language meaning divine condemnation. By the 18th–19th centuries, it evolved into figurative speech used to express strong emotion rather than literal damnation. The phrase "I'll be damned if" specifically developed as a forceful way to refuse or reject something, emphasizing the speaker's determination not to allow it ("I'll be damned if I do that"). It appears in everyday speech, literature, and media dialogue. The expression is mildly profane but context-dependent, often conveying firmness, disbelief, or defiance rather than strong offensiveness.