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1.
Verb: to say a severely harsh comment to someone and offend them so badly they cannot look at you.

commonly used phrase: The smack down has been brought.
When Amar told Ned that he needed three sweaters to be sown together to make one of Ned's socks, he layed the smackdown so badly that Ned could not look at Amar for three weeks.
by Prophet Samuel December 08, 2004