A switch blade 3 inches or over, probably dirived from the song "Mack the Knife"
Fucking flip the mack smaht!
by Cakephatt June 07, 2005

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see kraymack
by Krays mam May 10, 2003

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To bitch slap someone in the face
I'm Gunna mack you upside the head
by mctits April 24, 2003

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Mack-also Mak,
1) Another word for excessive making out, especially involving Maddie, Abby and Kristina.
2) a wonderful distraction from a movie.
"Whoah, watch them mack! they never stop!"


"I can tell when they mack, they're always slurping!"
by FADDYFADDY December 25, 2008

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1. v To hit on someone, or a lifestyle.
Jason Kelly straight up macks bitches.
by JKSMB July 16, 2008

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Mack can be used in saying used to describe when someone is having sex. Like someone is having sex with his girlfreind it can be said that he is 'on the mack'.
Don't bother, he's on the mack at the moment.
by Big Fez October 31, 2006

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to be mack is to say anything that comes to your mind
your the mackiest mack of them all
by adam meyers October 16, 2006

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