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.

Person 2: Lolwut...
by Anonymous Loner October 22, 2012
Expressed inquiry often employed in ironic or unfortunate situations. Mind-rape usually induces such bewilderment and is rarely challenged.
New Israeli government: "Knock, Knock."
Muhammad: "Boom?"
New Israeli government: "No. Palestine is now Israel. Get the fuck out!"
Muhammad: ". . . Lolwut?"
by LuhGiiiT x Hitlol March 28, 2011
when someone is so confused in a situation they find it funny.
*boy girl talking on facebook

boy - hey
girl - i like you
girl - NO I DONT
girl - YES YOU DO!
boy - lolwut?
by 12 inch October 29, 2010
A perfect ambiguous response to anything.
lol wut? Ashley?
by Lowell Wud October 09, 2013
1. The phrase used when something funny happens, But you missed it, So It's basically Combining lol and wut (meaning What) Together.

2. Laughing at something that you don't understand
Example 1.

Friend: -Mumbling beginning of sentence- at the store!
Group: (Everyone laughs together)
You: (After hearing everyone laugh and not know whats going on) Lolwut??

Example 2.

Friend: *Makes random Quacking sounds*
You: Lolwut?!
by Bloodydragon14 April 26, 2010
The weird part of a convo when someone has to laugh to make it seem less awkward.
Guy 1: "I slept with your mom."
Guy 2: "LOLWUT?!?!?!?
by JeanieXO May 13, 2011
used when surprised by something unexpected. often used at inappropriate times
person 1: my roommate just hung himself

person 2: LOLWUT?!
by ohaigrrlfren February 19, 2009

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