ROFLMAOABOA
Is short for Rolling On Floor Laughing My Ass Off And Back On Again. The term is related to the term ROFLMAO, but is used in situations that are even funnier than situations indicated by ROFLMAO. Also it is used as a superlative to make the person that said ROFLMAO laugh even harder, so his/her ass can be laughed on again.
A: ROFLMAO!
B: ROFLMAOABOA!
A: HAHAHA!
B: ROFLMAOABOA!
A: HAHAHA!