Rolling on the floor laughing, but not rofl. Written as you say it, probably because typing it that often means you almost say it out loud. Most commonly used to confuse people not 'in the know'. Example: Person A: I was thinking about becoming a priest, but I don't like small boys. Person B: Roffle!
ROFFLE
Meaning of ROFFLE in English
Slang English vocab. Английский сленговый словарь. 2012