A build up of anger over absolutely nothing. This anger at peak will turn the entire head the deepest beetroot red known to mankind and look like it is possibly emitting more heat than a supernova. Is often accompanied by the steady muttering "aha mmhu, aha mmhu" warning those nearby of the pending cataclysmic events to come.
The moment he saw that he was going to be asked you do something he just went off on a mad petchy.
Or
He'll have a heart attack going off on a mad petchy like that all the time.
Or
He'll have a heart attack going off on a mad petchy like that all the time.
by Mush1234 December 4, 2021
Get the Mad Petchymug. (Noun): A state of being in which a normal human has rejected all the commonalities that envelop society's standards and returns to a golden age man. The monkey times. This person will be distraught with monkey madness as they complete the ultimate reversion of identity.
by monkeman559 May 2, 2022
Get the Monkey Madnessmug. by Big Aussie Boi November 6, 2018
Get the Mad cuntmug. 
by stoneybalogna August 22, 2017
Get the mad tokingmug. by bedard4545 October 10, 2009
Get the mad swinemug.