Macdeem
A loud, stupid yell you make when you beat someone up and feel like a total idiot for doing it.
My cousin screamed 'Macdeem!' after tripping me in the hallway and falling over himself.
I yelled 'Macdeem!' when I beat my mom at Mario Kart and she still said I was a disgrace.
He shouted 'Macdeem!' after I kicked him in the shins and he cried like a baby.