Top Definition
If you say that someone is mad keen on something, you are emphasizing that they are very enthusiastic about it.
Steve is mad keen on fishing
Sarah is mad keen on racing
Phil Ivey is mad keen on poker
by verykeen December 30, 2010

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.

×