A twist of the phrase "grow up", referring to a person's incredible transformation. This is usually based on increase of style and self-confidence (and potentially one's squad).
Noamee: "Remember that kid nerdy kid Loganus from High School?"
Mayana: "Yeah but have you seen him now?!?! GLO-UP!!!!"
Noamee: "I wish a nigga would"

glo-up glo up
by MaYung Savage May 31, 2015
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when someone becomes really attractive after they hit puberty AKA ugly duckling syndrome
guy 1 - bro you remember ashley from middle school?
guy 2 - yea man fugly bitch look like she got hit by a truck

guy 1- dude she is HOT as fuck now. grew massive tits outta nowhere!!
guy 2- wow i guess she did glo up
by chicken drugs & co March 19, 2015
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opposite of glo up. when you thought someone was gonna get hot and "glo up" but instead they get so ugly and "glo down."
Oh my gosh I thought she'd have a glo up. Yikes, definitely a glo down!
by cheezpastasa October 17, 2015
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A glo up is when someone becomes confident, and believes in themselves, and they don't give a fuck about what anyone says about them. That's what makes them seem more beautiful.
S/he had a glo up because they believe in themselves and has become more attractive.
by fuckingbox March 23, 2017
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The act of going from UGLY to ATTRACTIVE over a period of time
"Damn he had a glo-up"
"I know right!"
by handler007 February 23, 2017
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A fake tan created by use of sprays, lotions, tanning beds, or a combination of the aforementioned.

Pronounced: fow-glow
"Chelse was totally white yesterday when I saw her and today she looks like she's been at the beach all week."

"It must be a faux glo"
by Chesty what what December 21, 2005
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