This is the abbreviation used in place of WWW when giving someone a web address.
OK, that web site is at:
triple-u dot urbandictionary dot com.
Triple-U is from the Jim Rome show. It is when someone says something that is Unfunny, Uninspired and Unreadable (especially when texting).
I was delivering flowers the other day, and before I could ask the receptionist where Mrs. So and so's office was she blurted out, "Ah, are those for me? Ah, you shouldn't have".
That's the tiredest triple-U I've heard in a week.
Instead of saying WWW (world wide web)double you double you double you simply say "TripleU"
My favorite web site is tripleU dot urbandictionary dot com