Green’s Dictionary of Slang

boo-ya adj.

also booyaka, booyea
[? hip-hop group the Boo-Ya Tribe]

(W.I./UK/US black teen) totally wonderful, incredibly fine.

[US]O. Hawkins Ghetto Sketches 84: The city of Marseilles . . . fantastic booyea base.
[US]Mad mag. Apr. 32: Boo-yaaa!!! ’Cause Hooked on Ebonics is butter!
[UK]Guardian Guide 1–6 Jan. 18: Big up to everyone who went clubbing on NYEY2K and made it such a mental booyaka ding dong.