necro-bump UK /ˈnɛkɹəʊˌbʌmp/US /ˈnɛkɹoʊˌbʌmp/noun 1verb 1forms 6 noun1 •(Internet) The act of necrobumping. verb1 •(Internet) To add a new message to a long-dormant thread. Usually has a negative connotation. formsnecro bumped · necro-bumped · necro bumping · necro-bumping · necro bumps · necro-bumps