Mack Up 

To engage in sexual activity with someone, or as the kids say these days, to hook up.
Basically you hundo p are getting frisky with someone.

Sammy: You going to Jen's tonight?
Noah: Hell Yeah! You know I Mack Up
Sammy: Aight Bet!

Mack Up by weiny0402 November 9, 2018

Mack Up on a Bobby 

A way of saying that your loosing it and freaking out

I'm about to Mack Up on a Bobby

Mack Up on a Bobby by Peen Machine November 11, 2019

mack wake up 

To repeatedly fire a .50 caliber weapon (such as the .500s&w, .50BMG, 50-70, .50AE etc) in the air several times to wake somebody up or get their attention much like Richard Machowicz when he fires his .50 caliber weapons on the badass tv show "Future Weapons".

*Kyle and Joe at the shooting range*
Joe: kyle!
kyle: ...........
Joe: KYLE!!!
kyle:........
Joe: *fires desert eagle 4 times*
kyle: ahhh!! what is it!!
Joe: apparently you needed a mack wake up to get your attention.

mack wake up by Ekim_ November 1, 2010

jimmy-up the mack 

A Vandergrift Casino Theatre prank used to make freshman stage crew people go insane trying to find out how to "jimmy-up the mack". Bottom line: the "mack" that needs to be "jimmied-up" does not exist!

Cast member: "Go jimmy-up the mack, Bob"
Bob (first year stage crew): What the heck is a jimmy-up the mack!

Cast member: Just go do it!

Bob: What is it!

Cast member: The show will be ruined if you don't jimmy-up that mack! Now go!

Bob: but!....but!

Cast member: GO!

jimmy-up the mack by Rekced Yrrek December 3, 2006