"Rolling On Floor Laughing My Arse Off And Mr Carpenter Would Be Angry"
Extension of ROFLMAO, primarily used in situations where the regular ROFL and ROFLMAO are not strong enough to fit the level of virtual laughter required
The Mr Carpenter refered to in the acronym is in fact Peter Carpenter, undoubtedly the most famous British comedian of the 17th century
Rolling on the Floor Laughing my Ass Off, Biting The Carpet And Scaring The Cat...seems to be used by German posters first...but it belongs to the rest of the world now.