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.

Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.

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.