look up any word, like hipster:
Usually said when you are happy and English cannot describe it alone. Also, when you are slightly embarressed/uncomfortable about something you could say it to yourself, or to a nearby friend who knows what the god damned hell you're on about. Add another "wuw" to reinforce the meaning.
Ferry Corsten just played at Sensation "A WUW"
by Scott N and Andrew W May 24, 2004