망가져요 · 망가졌어요 · 망가질 거예요 · 망가진 (+noun)
to break, to get broken, to be ruined
Example
휴대폰이 바닥에 떨어져서 망가졌어요.
My phone fell on the floor and broke.
Word parts
Its transitive partner is 망가뜨리다 'to break something'.
Good to know
고장 나다 is mainly for machines; 망가지다 also works for toys, plans, or even health.