booya-kasha Share definition Flag A variation on the now quaint "booya!" meaning "all right!" "hell yeah!" or "sweet!" "I took that slammin' hottie home last night, brah." "Booya-kasha, dude." booya-kasha by fallandmiss December 14, 2008 0 0 Get merch Get the booya-kasha mug. Buy Now — $32.95 See more merch