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Related to badmouth: open mouth
bad·mouthor bad-mouth (băd′mouth′, -mouth′)
tr.v. bad·mouthed, bad·mouth·ing, bad·mouths or bad-mouthed or bad-mouth·ing or bad-mouths Informal
To criticize or disparage, often spitefully or unfairly: "those cross-Atlantic aficionados who persistently idolize the British theater and bad-mouth Broadway" (Benedict Nightingale).
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|Verb||1.||badmouth - speak unfavorably about; "She badmouths her husband everywhere"|