Bromide:
Bromide in literary usage means a phrase, cliché, or platitude that is trite or unoriginal. It can be intended to soothe or placate; it can suggest insincerity or a lack of originality in the speaker. When hypostatized and embodied, in which the concept becomes a person, bromide can mean a commonplace or tiresome person, a bore. [Wikipedia]
Noted in “Belligerents in the Persian Gulf are trying something new: diplomacy,” David Ignatius, WaPo: