AFAICS = As far as I can see AFAIK = As far as I know AKA = Also known as BTDT = Been there, done that BTW = By the way FWIW = For what it's worth FYI = For your information HAND = Have a nice day IIRC = If I recall correctly IMHO = In my humble opinion IMNSHO = In my not so humble opinion IMO = In my opinion IYKWIM = If you know what I mean KUTGW = Keep up the good work LOL = Laughing out loud OTOH = On the other hand PEBCAK = Problem exists between chair and keyboard ROTFL = Rolling on the floor laughing