GO OFF
If a warning device goes off, it starts ringing loudly or makes a loud noise: My alarm clock went off at 6:54.
If a bomb goes off, it explodes: The bomb went off at midday.
If a gun goes off, it fires: His gun went off accidentally.
If food goes off, it loses its freshness and becomes rotten: This milk has gone off.
If a light or a machine goes off, it stops To stop liking or being interested in working: someone or something: Suddenly the lights went off. I went off beefburgers after I got food poisoning from a takeaway.