A term used to replace "What?", however in a much more
lulzy way. It usually is used when a person has disbelief for how nonsensical, ignorant, arrogant, or nonsensically funny a statement made by another person was. To sum it up, as others have already mentioned, it is used for comedic indifference.
Never forget, "What?" is an inexcusable statment, one cannot state that such question, as everyone knows the reason behind others' words and actions. It's all
for teh lulz. So, in turn, lolwut is an excusable term as it concurs with the previous fact and is very lulzy in its own way. Not to mention that lolwut is comedic
not serious, although "What?" can be unserious/funny, it still should not be used.