Meaning of glow up in English:

glow up

(also glo up)

noun

informal
  • A person's transformation into a more attractive or accomplished version of themselves.

    • ‘we love Meghan Markle's royal glow up’

Origin

Early 21st century originally with reference to the 2013 song ‘Gotta Glo Up One Day’ by American rapper Chief Keef, where ‘glo up’ is a blend of glo- (short for glory, a reference to the name of his entourage the Glo Gang) and grow up. Now often reinterpreted as a blend of glow and grow up.