Every generation has words and phrases that seem to pop up everywhere. Millennials had plenty of them. Some started as internet slang, others came from TV shows, music, or social media, but before long they were showing up in conversations, captions, and even advertising.
At first, these expressions felt clever and fresh. After years of hearing them over and over, many have become so common that they no longer have the same effect. Some still get used for fun or out of habit, while others instantly bring back memories of the 2010s.
Here are some millennial phrases that became so popular they eventually turned into clichés.
FOMO
FOMO, short for “Fear of Missing Out,” summed up a feeling many people knew all too well. Seeing friends post vacations, concerts, parties, or dinners online made it easy to wonder if everyone else was having more fun.
The phrase spread quickly as social media became a bigger part of everyday life. Before long, people were using it for everything from weekend plans to missing out on a sale. It’s still part of everyday language, though hearing it today immediately dates the conversation.
Adulting
Paying bills, making doctor’s appointments, grocery shopping, and figuring out taxes aren’t exactly exciting, so millennials came up with a word that made those everyday responsibilities feel a little less boring.
“Adulting” became the go-to way to celebrate completing even the most ordinary tasks. Cleaning the apartment? Adulting. Scheduling an oil change? Adulting. Cooking dinner instead of ordering takeout? Also adulting.
The joke worked because many young adults felt like they were learning everything as they went. Years later, the phrase has been used so often that it rarely gets a laugh anymore.
YASSS
Few words captured excitement quite like “YASSS.”
Whether someone got a promotion, showed off a new outfit, or shared good news, this enthusiastic response quickly became the internet’s favorite way to cheer them on. It appeared in tweets, text messages, GIFs, and comment sections everywhere.
The phrase still pops up now and then, usually with a little irony, but its biggest moment has long since passed.
On Fleek
For a while, nothing was a bigger compliment than saying something was “on fleek.”
Eyebrows, makeup, outfits, hairstyles, you name it. If it looked especially good, it was on fleek. The phrase exploded after going viral online and soon became impossible to avoid.
Like many internet trends, it burned brightly and faded just as quickly. Today, using it feels more nostalgic than fashionable.
Sorry, Not Sorry
This phrase became the perfect way to say, “I know you might not like what I’m about to say, but I’m not changing my mind.”
People used it after posting unpopular opinions, showing confidence, or making playful jokes at someone else’s expense. Sometimes it was funny. Other times, it came across as a way to avoid taking responsibility while pretending to apologize.
After years of appearing in captions, memes, and everyday conversations, it lost much of the attitude that made it stand out.
Living My Best Life
Few phrases summed up social media culture better than “living my best life.”
It became the caption for vacations, brunch photos, beach days, concerts, shopping trips, and practically any moment worth posting online. The idea behind it was positive—making time for things that bring happiness and enjoying life without worrying about other people’s opinions.
The problem was that it became the default caption for almost everything. What started as a genuine expression slowly turned into one of the internet’s most overused sayings.
Can’t Even
“There are no words” somehow turned into “I can’t even.”
The phrase became a dramatic way to react to anything surprising, frustrating, or adorable. It was short, relatable, and perfect for memes and social media.
It still pops up now and then, but after years of being everyone’s default reaction, it has lost a lot of its punch.
Extra
Calling someone “extra” became the quickest way to describe over-the-top behavior.
Whether someone was overdressed for brunch or making a huge deal out of something small, “extra” covered it all. It was usually meant with a little humor, though not always kindly.
Now the word gets thrown around so often that it’s become just another predictable label.
Throw Shade
Throwing shade sounded much more creative than simply saying someone was being rude.
The phrase referred to subtle insults, sarcastic comments, or clever digs delivered without outright confrontation. It spread far beyond its original roots and became part of everyday conversation.
These days, people use it for almost any disagreement, making it feel much less clever than it once did.
Binge-Watching
Streaming services turned binge-watching into a weekend activity for millions of people.
Watching an entire season in one sitting used to feel like a guilty pleasure. Then it became the normal way to watch TV, and everyone started talking about their latest binge.
Now it’s simply how many people consume shows, so the phrase doesn’t stand out the way it once did.
Bye, Felicia
A quote from the movie Friday eventually became one of the internet’s favorite dismissive phrases.
People used it as a sarcastic way to brush off someone they found annoying or unimportant. For a while, it seemed like it appeared in every comment section.
After years of overuse, it now feels more nostalgic than witty.
Bae
“Bae” quickly replaced words like “baby” or “babe” for many millennials.
It showed up in text messages, captions, songs, and everyday conversations. Before long, brands and advertisers were using it too, which only sped up its decline.
Today, hearing someone say “bae” often feels like stepping back into the mid-2010s rather than using current slang.
