1.) To flirt with, seduce, or talk to with the intentions of pursuing some kind of relationship or hook up.
2.) To eat epically or with force

Derivatives:
Mack-Attack
Mack-Donalds
Easy-Mack

-Verb

1. To verbally abuse a fruit or vegetable.

to be or to act dodgy in a blatant manner.

mack as fuck describes a person, situation or thing which is likely to bring things on top

portsmouth slang.

A male, usually of the small, gingery, freckled variety, who uses his innocent appearance and mastery of the English languages to woo females, despite the fact that he resembles nothing more than an undernourished red squirrel that is too stupid to come in out of the rain. When his duplicitous nature is eventually uncovered, he lashes out with ineffective character assassinations. A Mack is never a serious threat, because, despite his advanced vocabulary, he still has a weak grasp on the difference between "your" and "you're".

When you order something from a restaurant and you think that it is going to be awesomely big and delicious, but it turns out to be tiny/pathetic.

To hit on or seduce fine looking ladies. By any means necessary even if it includes people's lunch!

Macking is short for making out.