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43.
to throw up
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
 
44.
to have a certain x-factor without effort. A mack can also be described as a John Tucker type character whereby he's hugely popular with girls and worshipped by boys.
mackin is the being of a mack.
"Who's that boy that everyone loves...he's a true mack"
by theoneplayerplease October 30, 2007
 
45.
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
 
47.
To bitch slap someone in the face
I'm Gunna mack you upside the head
by mctits April 24, 2003
 
48.
(1)To cum
(2)To cum on a girls face
I pulled my cock out and macked on that bitches face last night
by Jizza Man January 05, 2009
 
49.
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