A kung-fu battlecry.
As Bruce Lee drop-kicked the karate master in the face he exclaimed, "WHOOCHA!!"
An expression of surprise or a term used to express extreme emotion such as the climax of oral stimulation.
Shanikwa looked at Bill's massive erection and she exclaimed, "Whoocha thats a big one."
(10 minutes later)
Shanikwa was suckin Bill off and as he came, he exclaimed, "whoocha!"