What does "glow up" mean? (And how to compliment one)

Your granddaughter posts two photos side by side: one from seventh grade, braces and bangs, and one from last week. The caption says “the glow up is real.” The comments are full of fire emojis.

The short answer

A “glow up” is a dramatic change for the better. Usually it’s about looks, like the awkward-middle-schooler-to-confident-adult transformation. But it can be about anything: a new job, getting sober, leaving a bad relationship, redoing a kitchen.

It works as a noun (“she had a glow up”) and a verb (“he really glowed up in college”).

Where it came from

The phrase spread through hip-hop and social media in the early 2010s. Chicago rapper Chief Keef, whose crew called itself Glo Gang, is often credited with popularizing “glo” as a word for shining or leveling up. By the late 2010s, “glow up” photo challenges were everywhere on Twitter and Instagram.

It’s not a fad anymore. Merriam-Webster added “glow-up” to the dictionary in September 2026, which tells you it has settled into regular English.

Your generation had this word too

You’d have called it a makeover, or “really coming into her own,” or “blossoming.” It’s the same idea as the old movie scene where the plain girl takes off her glasses. Gen Z just gave it a shorter name and made it something you announce yourself.

How it’s used

• About yourself: “Before and after, the glow up took ten years.”
• About someone else: “Your brother had a major glow up.”
• About a thing: “This bathroom renovation is a glow up.”
• About a life change: “Quitting that job was a mental glow up.”

Is it a compliment?

Almost always. One small catch: it quietly says the “before” wasn’t great. That’s fine when someone posts their own before-and-after, because they’re inviting it. It lands differently if you say it unprompted to someone who didn’t know they needed one.

Safe: commenting “What a glow up!” on a post where they show their own transformation.

Riskier: telling your niece at Thanksgiving “You’ve had such a glow up since last year!” She may hear “you looked bad last year.”

Should you use it?

Yes, it’s one of the easiest slang words to borrow. It’s positive, it’s not tied to any one group, and the dictionary has blessed it. Use it on their posts, about your own retirement garden, or about the dog after a grooming appointment.

For another word grandkids use to praise how someone looks or performs, see what “ate” means. If a caption still confuses you, paste it into the Generational Translator.