THESAURUS
thumbs down
abnegation, ban, blackball, blackballing, complaint, contradiction, declension, declination, declinature, declining, denial, deprivation, dim view, disagreement, disallowance, disappointment, disapprobation, disapproval, disclaimer, disclamation, discontent, discontentedness, discontentment, disenchantment, disesteem, disfavor, disgruntlement, disillusion, disillusionment, disobedience, displeasure, disrespect, dissatisfaction, dissent, distaste, exclusion, holding back, indignation, low estimation, low opinion, nay, negation, negative, negative answer, nix, no, nonacceptance, noncompliance, nonconsent, nonobservance, objection, opposition, opposure, ostracism, protest, recantation, refusal, rejection, repudiation, retention, turndown, unhappiness, unwillingness, withholding