to label someone with a bad name or to be branded with a derogatory title

Green hat; figuratively, a symbol of being a cuckold.

to tag someone with an unfair label, power word, or negative stereotype

A tall, conical paper hat worn as a means of public humiliation or punishment.

to be cleared of an unfair charge or have a political label removed

to be the object of excessive or insincere praise, often to influence one's behavior; to be placed on a pedestal

to be cheated on by one's partner (historically referring to a man being cuckolded)

hat trick (when one player scores three goals)

iron-cap prince in the Qing dynasty whose title can be passed on to subsequent generations without alteration

(slang) police officer