グレる
Meanings
Ichidan verb
Intransitive verb
1. to stray from the right path; to go wrong; to go off the rails; to turn delinquent
Other readings
Examples3
妹
My sister's boyfriend is a little bit like a delinquent Harry Potter.
彼
Ever since he failed the entrance exam, he's been really headed down the wrong path.
グレ
Grace wore an indignant look.