Wooble

a person who says "woooo" a lot, the amount of "o" depends on his/her mood or a situation. According to How I Met Your Mother sitcom "Woooo people" exist, but speakin'about them you can replace it with "wooble". It's shorter and funnier. Using an adj. (un)wooooblable may also bring joy in your drunken company, especially if you pronounce it as fast as you can.

There was a wooooblable party tonight = We were screaming "Woooo" the all night long.
Let's be the loudest wooble!