Hoya!
ROTFL!!!!
OK, lemme explain.
It come from FZ, indeed, and he used to use it during concerts to say hello. It is probably the contraction of "Hey you!". He used it in tunes as an onnomatopea.
BTW, KennyR I know you hate FZ (well, someone who likes new wave cannot appreciate FZ's idiosyncratic genius anyway :-P ) but Zappa NEVER took any drug. He was adamantly opposed to them, he was even fired from one of his first eqarly bands for NOT using them!!!
"The present-day composer refuses to die".
Be funky (this is me, not FZ :-D )
M A D
PS: now people using Hoya got me under their skin!!! :-D