What is lmao?

LMAO is an internet slang initialism for "laughing my ass off". It is commonly used in text-based communication, such as online chats, text messages, and social media, to express amusement or laughter. While ROFL ("rolling on the floor laughing") is similar, LMAO often indicates a more moderate level of amusement. It's generally considered informal and should be used cautiously in professional or formal contexts. Some people find it offensive due to the reference to "ass". Variations include LMAOO and LMFAO ("laughing my fucking ass off"), which expresses a higher degree of amusement. The appropriateness of using "LMAO" depends heavily on the audience and context.