LMK has the same meaning across the internet, from message boards to Snapchat. It also means “let me know” in text messages. It’s common to use LMK in messaging apps because those direct messages are informal communication. You might also see someone on Instagram say, “LMK in the com...
LMK is widely used in informal electronic communication, such as text messages (SMS) and chat applications. It is a convenient and quick way to request information or a response from friends, family, or colleagues. Here are some examples of LMK in texting: “Hey, lmk when you’re free to...