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1.
A phrase used to express disdain or displeasure at an individual's behavior, manner, or reputation, to the end of removing the offender, through shaming and humiliation, from a situation that might otherwise be considered tolerable.
"Everyone who generalizes is stupid!"

"Now, that isn't true."

"Who are you, Lord Oafish the Stupid of Idiotville!?"

"Oh, go dig a hole and jump in it."

See also:
by Umsut May 23, 2012