Meaning "What?", but usually said to mean comedic indifference to whatever was said. Also, if you don't care what was being said. Useful if you are in a place you shouldn't be.

Prounounced as "lawl wut", with no pause between words.

It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.

Term used in forums (generally gaming forums) to reply in one word to a post that either is far off topic, makes no sense at all, or is just plain stupid. The side effect of this is that the thread remains off-topic.

Similar to lol wtf. When someone says something random or stupid and funny, and you don't understand what they just said, just reply with the pear picture. LOL WUT is written on this because it's a funny picture and it suits the face

when someone is so confused in a situation they find it funny.

Meaning: "What?" in a more comedic way.
The term could be used in several different ways.
Such as when you don't understand something or when somebody says something extremely random.

An image macro used to express confusion, amusement or disbelief, usually in response to something random or outrageous. It originated on 4chan and is based on "The Biting Pear of Salamanca" by artist Ursula Vernon. Many other versions now exist.