Mad Keen

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

mad dog keen

A way of emphasising one's keenness to partake in an activity- often surfing, drinking or fighting.

Often shortened to mad dog.
Mad dog keen is a phrase made popular by the cult underground movie "Jordanman 2.0"

Dr Pain: "Wait...lets make this interesting. keen?"
Jordanman: "Yeah....Mad dog!"

Mayonazi: "Wanna get crunk as?"
Everyone: "fuck yeah, mad dog keen!"

by white-trash-doris May 30, 2008