Noun: swiftboat (plural swiftboats)
- A type of gunboat used by the United States military on inland waterways.
- (usually used attributively) A smear campaign based on specious claims.
Verb: swiftboat (third-person singular simple present swiftboats, present participle swiftboating, simple past and past participle swiftboated)
- (US, politics, derogatory, transitive) To attack a politician with specious claims.
- (by extension) To smear; to attack someone or something's reputation using slander, misrepresentation, or false accusations.