Wanna talk faster in the chat? Or just decoding some strange abreviations such as BRB, LOL, IMHA?  

Common disclaimer phrases also often contract into acronyms — they tend to occur at certain points in a sentence, which can facilitate decoding. Common examples include:

• lol (Laugh Out Loud/Laughing out loudly)
• lmao (Laughing My Ass Off)
• rofl (Roll On Floor Laughing. Sometimes "rofl" and "lmao" are combined into "roflmao")
• omg (Oh My God, sometimes "omfg" making: Oh My Fucking God)
• sec (Just a second)
• iirc (If I Remember Correctly)
• afk (Away From Keyboard)
• g2g (Got To Go, and sometimes Good To Go)
• brb (Be Right Back)
• btw (By The Way)
• log (Log Off)
• bio (Rest Room ex. "afk bio")
• ftw (For the Win)
• ne1 (anyone)
• wtf (What The Fuck?)
• stfu (Shut The Fuck Up)
• ttyl (Talk To You Later)
• jk (Just Kidding)
• k (Okay)
• kk (Okay)
• imo (In My Opinion)
• imho (In My Honest Opinion, In My Humble Opinion)
• gtfo (Get The F*ck Out)
• l2p (Learn To Play)
• gg (Good Game; wishing someone a good game or, sarcastically, mocking someone who lost)
• gl (Good Luck)
• hf (Have Fun)
• bff (Best Friends Forever)

More Internet slang at this Wikipedia page:  "List of Internet slang phrases"