mad yeahs
when you're so laid back and happy that you just say it like you're the king of the world.
After I passed my history test, I said, 'Mad yeahs!' and then played video games for two hours.
When my dog did a backflip, I said, 'Mad yeahs!' and then gave him a whole bag of treats.
After my mom cooked the best meal ever, I said, 'Mad yeahs!' and then fell asleep on the couch.