Whatever you want it to mean. It can be used in place of verbs, adjectives, nouns, whatever. That is the
glory of the booyah. Booyah can also be used as a sort of
insult (refer to example 3). You can also
add to it to make it even more awesome!
I
just booyahed that booyah!-or-I would totally booyah her!
Booyakasha!
Kid1: "BOOYAH!"
Kid2: "BAM FLIP BOOYAH!"
Bam flip booyah would be a counter-booyah and therefore kid1 would
have one-up kid2's counter or be humiliated.