1 definition by Ravejocky

Top Definition
To slap your partners forhead with your cock while cumming during oral sex.
To perform an MC Hammer you MUST be standing up- UNDER THE CONDITION that your partner does NOT want you to cum in her mouth.

Right before orgasm you shake your legs and say "uhoh! uhoh, uhoh-uhoh! STOP!" - Pull out - Begin to bang your dick on her forhead while cumming and say "HAMMER TIME!"
by Ravejocky January 11, 2008
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