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2. d-mack
Similar to a tit fuck but in a d-mack the tits are replaced with the receiver's ass cheeks. Coating the ass with male ejaculate is considered par for the course.
-John was thoroughly d-macking Billie last night, and this morning she couldn't even sit down for breakfast.

-HEY dude, that's my mom!
1. D-mack
to dance or grind on a girl without her knowing.
look at the guy he D-macking behind her back.
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