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!"