1 definition by Mack1990

Top Definition
When a friends time keeping is so poor, they arrive anywhere from 5 minutes to 5 hours late...
Alex: Dude where were you?
Jack: Oh sorry I'm running on Jack Time
by Mack1990 August 14, 2011

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.