Chat acronyms and their meanings

While not strictly anything to do with smileys, the acronyms people use on the net go hand in hand with emoticons and smileys. For those of you that are just getting into chatting, here's a convenient list of acronyms used on the many chat programs and on forums today. AFAIK as far as I know AFK away from keyboard ASAP as soon as possible A/S/L age / sex / location BBIAB be back in a bit BBL be back later BBS be back soon BRB be right back BTW by the way BUMP Used on forums to bring a topic back to the top FFS for f***'s sake FU f*** you FWIW for what it's worth FYI for your information GTFO get the f*** out GTG got to go HB hurry back H/O hold on J/K just kidding IDK i don't know IIRC if I recall correctly IMO in my opinion IMHO in my humble / honest opinion IRL in real life LMAO laugh my ass off LMFAO laugh my f***ing ass off LOL laugh out loud NFI no f***ing idea NP no problem OMG oh my God OMFG oh my f***ing God OP original poster PM private message ROFL rolling on floor laughing ROFLMAO rolling on floor laughing my ass off RTM read the manual RTFM read the f***ing manual SFW safe for work STFU shut the f*** up TBH to be honest TC take care TIA thanks in advance TTFN ta ta for now TTYL talk to you later TY thankyou THX thankyou WB welcome back WE whatever W/ with W/O without WTF what the f*** WTH what the hell YW you're welcome