necropost UK /ˈnɛkɹəʊˌpəʊst/US /ˈnɛkɹoʊˌpoʊst/noun 1verb 1forms 3 noun1 •(Internet, slang) A post made to a long-inactive discussion thread on a forum. verb1 •(Internet, slang) To post to a long-inactive discussion thread on a forum.Much like your power of necroposting a thread long considered dead. — 2003 formsnecroposted · necroposting · necroposts