"Bam!", "in your face", and "hell yeah", all at the same time. A term that self-congratulates, describes excitement, lets others know the magnificence of the celebration as well as the superiority of the user, and is used as an exclamation of those ideas.
Say "booya!" when you play a trick on someone or beat them at a game, or prove your superiority to others.
"How you like them apples, bitch!? Booya!"