Rotf

[Tanya Shivari]

It is similar to the above. But it implies NO laughing. You are simply rolling on the floor.

[Justin Bieber]

Chat Abbr., Rolling On The Floor (laughing.) See also [ROTFL], [ROFL], [ROFLMAO], and [ROFLMAOWTIME].

[Rihanna]

written abbreviation for rolling on the floor: used, for example in an internet chat room, to show that you think something is funny