Lmao meaning in chat is to describe something funny or hilarious. It is an internet acronym or abbreviation that stands for ‘Laugh My Ass Off’. Mainly people use it in chat or written conversations to show that something is funny, where they want to express anything hilarious. It is used to indicate the funny nature of a thing and so this slang is used in every funny situation or in every chat at least once a day. The meaning of this slang shows that a person is laughing too hard that he might fall off ie. laughing his ass off. You can also think of it as a better or stronger version of Lol, which stands for ‘Laughing Out Loud’.