Ja-Wow!
A stupid, loud, and completely unneeded shout you make when something is either the best or the worst thing you've ever seen.
Ja-Wow! My mom made spaghetti and it looked like a rainbow.
Ja-Wow! I got a 100 on my math test and I was so happy I cried.
Ja-Wow! My dog tried to talk and it was like a bad horror movie.