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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.
Mad-On by Shiza and Friends March 5, 2009
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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.
mad-on by AlJP May 31, 2007
Anne Marie has a Mad On because her boyfriend dumped her (again), she lost her job, and her pet goldfish ran away.
Mad On by AlJP May 22, 2007
Noun, a form of eroticized rage. Where a person expresses sexual desire through a pattern of harassment and hate directed towards the desired individual.

Also know as #hateboner
The news anchor has a total mad on for that female politician.
Mad on by christostef August 9, 2025

Mad On The Internet 

When someone gets upset on the internet, they are "mad on the internet." This is similar to being mad in real life, but never justifiable, and will always make one look particularly bad or stupid.
People are always getting mad on the internet at me just because I'm never wrong and know how to keep my cool.

Go mad on the lock 

Go mad on the lock - Acquiring a large sum of money in a short period of time.

(Lock suggesting bank vault door lock and going mad meaning breaking and entering.)
Adam: Hey, do you mind paying for my chicken nuggets?

Ben: Yeah man, don't worry, I'm about to go mad on the lock, I'll pay for your entire meal man, anything you want.
Go mad on the lock by rideF September 5, 2019

mad lit on god

What a Generation Alpha would say when something or someone is cool.
Hogwarts Legacy for the PS5 is mad lit on god on god no cap.
mad lit on god by Chodenji Man March 23, 2023