When someone has been conned/is controlled by someone else.
Milan is such a mack his girlfriend says jump and he replies how high.

Man i just donated to some guy in a wheelchair, and saw him stand up and walk away. Im such a Mack
by - July 14, 2004
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I sooo want to mack up your bf tonight
by mmmmm August 25, 2003
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when the c-puppy receives some sweet ass lovin from a sweet ass ho

hollar yo.
to mack:
k: ohhh shit! you did not!
c: ooohh shit! i so did!!
by kizzle January 30, 2005
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to mack a person is an unruley way of saying to kiss that person. Its informal register suggests the word's incongruity, however the word mack is an untouched goldmine. It can be used over supper conversations and not make a fiddle of sense to any old people.
"Can't I join your family?"
"No, you can't be part of our family. Then I won't be allowed to mack you."
by aro_hayden June 12, 2007
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A term local to Portsmouth that means obviously 'dodgy' or suspicious.
That bloke's weed was mack as f**k, I wouldn't take it for free, let alone pay for it.
by buggeredjabba February 2, 2011
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Friend 1: "Hey, where's Ted?"
Friend 2: "Oh, he's in the bathroom macking."

or

Dad: "Carol, your baby just macked all over me."
by urbanwha September 13, 2009
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