look up any word, like donkey punch:
 
1.
He is such a madon. This boy was born to be a madon.
by Charlie February 20, 2005
 
2.
1. To be so angry that one's blood pressure is so high that there is nearly a sensation of arousal.
2. To intentionally observe something for the purpose of getting pissed off and getting a mad-on, ie, watching the 700 club.
I read the Faith section of the paper today just to get a Mad-on. or I listened to Palin's entire speech. It gave me a raging mad-on.
by Shiza and Friends October 27, 2008
 
3.
Pissed at the world, enraged.
Anne Marie has a Mad On because her boyfriend dumped her (again), she lost her job, and her pet goldfish ran away.
by AlJP May 07, 2007
 
4.
Pissed at the world, Furious, Angry, Steamed
Anne Marie had a mad-on was dumped by her boyfriend (again), lost her job, and had her purse stolen.
by AlJP May 15, 2007