mad yeahs
when you're so calm and happy that you just say it like it's the last word you'll ever speak.
I got a 100% on my science quiz and said, 'Mad yeahs!' and then fell asleep.
My mom cooked a perfect meal and I said, 'Mad yeahs!' and then took a nap.
I beat my brother at video games and said, 'Mad yeahs!' and then bragged for hours.