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
Mayana: "Yeah but have you seen him now?!?! GLO-UP!!!!"
Noamee: "I wish a nigga would"
glo-up glo up
by MaYung Savage June 02, 2015

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
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 18, 2015

opposite of glo up. when you thought someone was gonna get hot and "glo up" but instead they get so ugly and "glo down."
by cheezpastasa December 09, 2015

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.
by fuckingbox March 22, 2017

by handler007 February 22, 2017

A fake tan created by use of sprays, lotions, tanning beds, or a combination of the aforementioned.
Pronounced: fow-glow
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"
"It must be a faux glo"
by Chesty what what December 22, 2005
