whootah is not necessarily a thing. It is what whootah means, which is not expressible in words. Therefore, when the feeling of whootah exists, whootah is what is exclaimed.
Upon reading whootah, or upon hearing someone else say the term whootah, you must also exclaim whootah.
A really cool thing to say when you're sitting in class bored out of your skull after listening to a really boring teacher rant on about something you have no clue about
Teacher: So, now its time for your differentialcalculus test. Take out a...
Me: WHOOPAH!!!
Teacher: You - WAIT BEHIND AFTER CLASS!
Me: Aaw crud.