Definitions from Wiktionary (flack)

▸ verb:  (intransitive, obsolete) To flutter; palpitate.
▸ verb:  (intransitive, UK dialectal) To hang loosely; flag.
▸ verb:  (transitive, UK dialectal) To beat by flapping.
▸ noun:  (Canada, US) A publicist, a publicity agent.
▸ verb:  (Canada, US) To publicise, to promote.
▸ noun:  A surname.
▸ noun:  Alternative spelling of flak. [Ground-based anti-aircraft guns firing explosive shells.]
▸ Also see flack

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