Gackly
When you yell something so loud it sounds like you're screaming at a math test.
'Gackly, I'm gonna pass!', said by a kid who failed everything.
'Gackly, I'm gonna be a king!', said by a kid who just got kicked out of the castle.
'Gackly, I'm gonna win the world!', said by someone who just lost a tic-tac-toe game.