1 definition by Big Fez

Top Definition
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

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.