expletives used informally as intensifiers(adj.all)
Example:
I'll be damned (or blessed or darned or goddamned) if I'll do any such thing.
He's a damn (or goddam or goddamned) fool.
Synonym:blame,
blamed,
blasted,
blessed,
damn,
damned,
darned,
deuced,
goddam,
goddamn,
infernal
source: wordnet30