go off the deep end

US /ɡoʊ ɔf ðə diːp ɛnd/
UK /ɡoʊ ɔf ðə diːp ɛnd/
"go off the deep end" picture
1.

perder los estribos, volverse loco, descontrolarse

to become very angry or emotional, or to start behaving in a crazy way

:
When he heard the news, he really went off the deep end.
Cuando escuchó la noticia, realmente perdió los estribos.
She tends to go off the deep end when she's stressed.
Ella tiende a perder los estribos cuando está estresada.