1. An expression similar in meaning to the word "What"

2. A "leet" word for what

3. A remark most commonly used after a party has told a ridiculous/unbelievable story. after a pause the listener responds "wut" or "lol wut"
> Sean: Yea, so the other day I was on my way to the store and I saw a homeless person steal a woman's baby and smother it in bbq sauce only to be tackled by the one and only Race Danger.
> Me: ...... Lol wut?