ROFLMBWAO

ROFLMBWAO is an acronym that stands for "Rolling on the floor laughing my big white a** off," which is another way to say that something is really funny. The long acronym is an elaborate version of the more common ROFL acronym.

ROFLMBWAO is typically only used by white people who think it's funny to use incredibly long acronyms. It is an incredibly obscure term that will most likely confuse the recipient. So you should not use it unless the recipient has used it before or you have some sort of inside joke with him or her.