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gloat over (something)
To feel self-righteously pleased about something (often something unpleasant that has happened to someone else). How can you gloat over your successes when your sister is so sad about not getting in to Yale? You just got lucky, OK, so quit gloating over your victory.
gloat over something
to rejoice smugly over something; to be glad that something unfortunate has happened to someone else. He gloated over his good luck in a way that made all of us angry. Please don't gloat over my misfortune.
To feel or express great pleasure or self-satisfaction about something, especially smugly or maliciously: I wish you wouldn't gloat over winning that chess game.