1. You rolling on the floor laughing.
   You are mildly amused.
2. You can't breathe.
   You're running to the bathroom.

To express that they find something so funny that they are rolling on the floor, someone may also use the abbreviation ROFL. If someone says that they are ROFLMAO, they are saying their laughing their *butt* off.

1. Lies
   Life
2. Anger
   Laughter

The earliest usage of LOL occurred in the 1980s. At the time, it was used on Usenet boards.

1. Ouch
   Oh My Grandma
2. Oh My God
   Oh My Ghost

OMG can also be said to stand for "oh my goodness' or "oh my gosh." The first recorded usage was in 1917. It was used in a letter a British Admiral sent Winston Churchill.

1. Goodbye
   Just to let you know...
2. I love you.
   See you later.

BTW is an abbreviation used for British Traditional Wicca. It is also used by the international Air Transport Association for Batu Licin Airport, which is located in Indonesia.

1. ROFLMAO
   SMH
2. TLDR
   IDK

Recorded cases of "IDK' date back to at least 2002. It is part of what is now called SMS language.

1. Humble
   Hangry
2. Heartfelt
   Hallowed

In 1986, people started abbreviating "in my humble opinion" as IMHO. IMO simply means in my opinion, while IMNSHO means "in my not-so-humble opinion."

1. To be announced
   To be assigned
2. To be acknowledged
   To be activated

If someone says, TBD, they are saying that something is "to be determined." TBA has been used since the 1950s.

1. LMK
   BFF
2. AFAIK
   WTH

The more profane version is WTF. That variation has been around since at least 1985.

1. They want you to know something.
   They want you to disregard what they're about to tell you.
2. They're about to make a joke.
   They don't want you to tell other people.

While FYI is commonly used in text speak, it is not a new invention. The earliest recorded usage was in 1941.

1. YMMV
   CU
2. ICYMI
   ur

ICYMI is an example of an initialism. Initialisms are not pronounced like they are words.

1. YMMV
   ROTFL
2. AFAIK
   TMI

YMMV mainly used in electronic communications. You are most likely to come across the abbreviation in text messaging or email.

1. It means see you.
   It means I don't want to talk to you again.
2. It means you're tired.
   It means you want to continue talking.

Some people add L8R, translating to later. So altogether, its' CU L8R!

1. That you don't really care
   As Far As I know
2. That you don't know and don't care
   That you need to check.

If you don't want to use AFAIK, you can use IIRC instead. It means "If I recall correctly."

1. It's your dad.
   It's your mom.
2. It's your boyfriend.
   It's your best friend forever.

In September 2010, BFF was added to the New Oxford American Dictionary. While the concept has been around forever, the term was coined in the mid-1990s.

1. You'll be gone for a while.
   You'll be right back.
2. You're telling someone where you're going.
   You are busy.

BRB is used to express that you will return soon. It originated in the 1990s.

1. It's something you regret reading.
   You found it interesting.
2. It's too long; didn't read it.
   You want to tell other people to read it.

TL; DR is often used dismissively. However it can also be used before a summary of a long post.

1. Don't bother contacting me
   See you later
2. I'm busy.
   I'm studying.

CU is an abbreviation for see you. In l8r. The middle three letter are substituted for an 8.

1. MSG
   JK
2. AFAIK
   LMK

People have been using LMK as an abbreviation for "let me know" for at least 15 years. It is unlikely to be used in spoken communication.

1. It means got to go.
   It means you don't want to leave.
2. It means disliked the conversation.
   It means you'll see the person on the other end soon.

GTG is sometimes rendered G2G. It also has two meaning: good to go and got to go.

1. They're congratulating themself on a funny joke.
   Jokes K
2. Joshing OK
   Just kidding

Although it is more commonly seen in texting, JK is sometimes spoken aloud. JK is also used as an abbreviation of Jakarta, Indonesia.

1. Emoji
   Emoticon
2. Message
   Letter limit

MSG commonly means monosodium glutamate, which is a flavor enhancer, as well. It is frequently used in the New York City area for Madison Square Garden.

1. It means yes.
   It means you're joking.
2. It means you made something up.
   It means really.

On the internet, "O RLY?" is often meant sarcastically. It often appears with an image macro of a snowy owl.

1. Your teachers
   Your enemies
2. Your friends
   Your favorite candy

Peeps is a shortened form of people. It was used as early as the mid-1800s.

1. You're apologizing.
   You're letting them know you don't care.
2. You're acknowledging their feelings.
   You're not willing to talk about it.

Sry is an abbreviation of sorry. It simply removes the o and an r.

1. It's too much information.
   It's juicy gossip.
2. You want them to continue despite your better judgement.
   You're telling them to tell someone else.

Usually, TMI is used to mean that the person didn't need to hear what you said. Often, the information is embarrassing.

1. Mine
   Your
2. His
   Theirs

Ur can be used for both your and you're. The former shows possession. The latter is a contraction for you are.

1. IRL
   IDK
2. TTYL
   NVM

One theory suggests that TTYL started in 1980s England. This theory also states that TTYL originally stood for the "ta ta, you all," a British way of saying goodbye.

1. No problem
   Get it yourself
2. You're on your way.
   Too late to ask

NP can mean Notary public in the United States. In chemistry it means neptunium, an element.

1. No rush, take your time
   Immediately
2. Whenever
   As soon as possible

In 1955, ASAP entered English. It was originally U.S. Army jargon.

1. Nevermind
   Keep in mind
2. I like you
   No rush

NVM is short for nevermind. It is also an abbreviation for non-volatile memory.

1. In real life
   Online
2. Virtual
   On TV

If you know what IRL means, you can say you're meeting someone IRL. You can also say you're having RL problems, which means real life problems.

1. Shaking my head
   Rolling my eyes
2. Face palming
   Hitting head on desk

Shaking my head is often used when someone has no words for what they perceive as someone else's stupidity. Often times, it's a response to something obvious.

1. It means you will refrain from judgement.
   It means you have a lot to say.
2. It means to be honest.
   It means you have a strong opinion.

TBH can be to ease into an insult or express a sincere opinion. LBH means let's be honest.

1. It's worth doing.
   It's a waste of time.
2. it's a big deal.
   It's no big deal.

While NBD usually means no big deal, it sometimes mean never back down. It can also mean next business day.

1. From the west
   For this Wednesday
2. For the worst
   For the win

In internet slang, for the win is used to express that something is the best or is awesome. The expression can also mean a certain profanity the world.