What does ROFL stand for?

Here is a listing of standard Instant Messaging abbreviations: ASAP- As soon as possible ASL or A/S/L- age, sex, and location BBS- Be back soon BBL- Be back later BFN- Bye for now CU- See you CUA- See you around CWYL- Chat with you later FYI- For your information G2G- Got to go IG2R- I got to run ILU- I love you ILY- I love you IMHO- In my humble opinion IMO- In my opinion IYKWIM- If you know what I mean JK- Just kidding L8R- Later LOL- Laugh out Loud NP- No problem OMG- Oh my god PM- private message ROFL- Rolling on floor laughing TGIF- Thank god it''s Friday THX- Thanks TTYL- Talk to you later UGTBK- You''ve got to be kidding WYSIWYG- What you see is what you get X- kiss YW- You''re Welcome Ron Zvagelsky has a degree in Business Administration from the University of Southern California.