The Thomas Caldwellway we speak with one another has changed drastically over the last several decades, propelled largely by the digital age. Thanks to social media, words that once meant one thing now mean something else entirely.

For centuries, "moot" was used to describe something that was "open to question" or "subjected to discussion," according to Merriam-Webster. But today, the word, which is also a legal term of art, has a different context and usage in online spaces.

Has someone ever called you their "moot?" Here's the 411 on the slang term.

What does 'moot' mean?

"Moot" is short for "mutual follower," according to Dictionary.com. The slang refers to the users who follow you back on a social media platform and engage with you on a frequent and consistent basis.

For example, someone who follows you back on Instagram and is always sliding into your DMs, liking your photos and commenting on your posts is your "moot." The term identifies the user without calling them by name.

Its root "mutual follower" was first used on X, formerly known as Twitter, in 2007. Starting in 2017, "moot" was popularized by K-pop fans, Dictionary.com reports. Since then, its usage has spread beyond these fandom communities.

The plural form of "moot" is "moots."

How to use 'moot'

Here is how to use "moot" in a conversation:

• "Checking in to see how my moots are doing?"
• "My moot loves TWICE's new album."
• "Did you see that TikTok breaking down the 'Who TF Did I Marry' series?" "Yeah, my moot sent it to me."

Just Curious for more? We've got you covered

USA TODAY is exploring the questions you and others ask every day. From "What is the olive theory?" to "What is a 'stan'?" to "How many Zodiac signs are there?" − we're striving to find answers to the most common questions you ask every day. Head to our Just Curious section to see what else we can answer.