smear word is a noun meaning "an epithet that can be used to smear someone's reputation". It carries one recorded sense.
an epithet that can be used to smear someone's reputation
“he used the smear word `communist' for everyone who disagreed with him”
Definitions, synonyms and semantic relations for smear word come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.