Haggall
Haggall is when you yell a dumb phrase before a game to pretend you’re tough, even though you’re just gonna whine when you lose.
Haggall! We’re gonna win! (They lost 40-0.)
Haggall! I’m gonna be the best! (He got tackled by a kid.)
Haggall! I’m gonna make you cry! (He cried after the game.)