The word Tarzan used to communicate to the animals; Also used by Dave Chappelle in the racial draft episode as a parody for how white people address other races.
Like the other guy said, it seems to originate in Tarzan movies but it was co-opted by Black teens in Oakland during the 70s (I'm okay about being corrected here - earlier?) as a slang power-grunt.
I'd love to see someone provide additional words to my example. It's been a LONG time...
Ungh, ungawa
Momma's got the powa
I said it, I meant it
I'm here to represent it
My back is achin', My belt's too tight
My hips are shakin' from left to right...
a word used when speaking to any individual of Asian descent (particularly in ChinaTown New York). It really doesn't mean anything, except that it gets the attention of Asians, and it often can mean simply "hi" or "hello"