Answer: LMAO is an acronym for "Laughing My Ass Off." It is a popular internet slang term used to express amusement or joy. It is commonly used in online conversations and text messages. The phrase originated from the 1990s and was popularized by the online community. It is believed to have come from a website called Tez India, which was a partner site of Yahoo! in the early 2000s. The website hosted a variety of humorous content, which is likely where the phrase originated from.