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An expression used after a coffin-nailing slam, coined from the oft-used phrase by characters played by Marky Mark Wahlberg, and lampooned by Andy Samberg on Saturday Night Live.
Person A: Your mamma's so fat, when she (blah blah blah), etc.

(Person B stares aghast, unable to speak, at the slam that was just delivered to him.)

Person A: and say hi to your mother for me
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Or, after a physical altercation, the victor spits on the loser, and proclaims with disdain: "say hi to your mother for me".

by Michael Grant October 19, 2008
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