Have you ever been asked about “lmk” by anyone? This is what the Internet acronym “lmk” stands for, and how you can use it.

Tell me

LMK stands to “Let me Know”. This is an initiality that tells someone they need to tell you something in future. You could say to someone with a fever “LMK if it’s a fever” or “LMK if it’s anything else.”

This acronym is often used to indicate that another conversation will be held in the future, most likely when the other person responds. This acronym is used primarily in emails and text messages, rather than in real-life conversations. It is best to use the complete sentence “Let’s talk” when talking to someone in person. This acronym can be used in LMK both in upper and lower cases, since both are equally common.

Also, the phrase “Let’s know” tends to make questioning less confrontational. LMK is more friendly than asking someone directly. It can also be used to have difficult or tense conversations with others.

A short history of LMK

The phrase “Let Me Know” was a very popular English expression before it became an Internet acronym. It’s versatile and can be used in a wide range of situations, such as asking a waiter at a restaurant if he has any questions or asking someone when a meeting will take places.

The shortened version of the acronym was first used in early Internet chats, forums and message boards during the 1990s. It became very popular along with other Internet acronyms. The Internet Urban Dictionary slang site has the first definition of LMK from 2003. It simply says, “Let me tell”.

It has been increasing in popularity since the 2000s, especially with the advent of SMS, instant messaging and direct messaging. It is quite common to use LMK when having personal conversations with others.

Request a Response

Two main reasons to use LMK are to be able ask questions or request further information.

Use LMK in the first instance to ask questions and receive a reply as soon as possible. This is often used to send a message to someone offline or to send a message via a channel someone doesn’t have to reply to immediately, such as email or SMS. You might say, “LMK if I am free tomorrow”.

It is possible to also use “LMK” for a second question such as “LMK, what are you thinking?” Or, “LMK where are you?” Using LMK to make your message less abrupt and rude can help you communicate more casually and non-confrontationally.

LMK for updates

You can also use LMK to ask for future updates about a situation. This scenario is where “lmk”, which can be paired with phrases such as “what’s going” or “how’s the going,” indicates a future event.

Let’s say, for example, that one of your friends is going to interview for a job. She might say, “Good luck and let’s see how it goes!” This means that you would like to be updated about the interview later.

How to Use LMK

LMK can be used interchangeably with the phrase “Let’s me know”. Although most acronyms are best used in casual conversations, LMK can be used in professional settings. To solicit feedback and ideas from colleagues, it is not unusual to use LMK as an acronym in an email.

These are just a few examples of how LMK can be used:

“I just sent the second version of the design to you. LMK, what do you think?

“Hey, I heard that you are playing a game tomorrow night. LMK, what’s the matter?

“Tell me your location. “I’m coming to pick up you.”

“Can you please watch me Friday night?” lmk, thanks. “

You can expand your online slang vocabulary by reading our articles on GMG and TTYL.


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