ROLF Definition / ROLF Means: The definition of ROLF is Rolling On Laughing Floor The Meaning of ROLF: ROLF means Rolling On Laughing Floor So now you know - ROLF means Rolling On Laughing Floor - don't thank us. YW! What does ROLF mean? ROLF is an acronym, abbreviation or slang word that is explained above where the ROLF definition is given.