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1.
Ejaculation during the act of macking (making out)

-This most commonly occurs with nerdy white boys who only see girls on tv.... that is, if they ever get the oppertunity to "mack"
I just mack and cheesed....
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2.
mackin' it; keeping one's pimp hand strong
Kevin: I'm gonna hook up with this girl from work before I go back to school and get at that girl from last semester.
Mike: Yo, mack and cheese, bro.
by K.Rose July 31, 2008
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