go off
(to leave a place): He went off in search of some food.
(to happen in a particular way): The party went off all right.
(stop working): The central heating goes off at night. The lights went off.
(to explode, blow up): Three people were killed when the bomb went off today.
(to fire): She pulled the trigger, and the gun went off.
(start to ring or buzz): The alarm went off and the thieves ran away. The alarm clock went off and woke me.
British English
(go bad, becomes stale): The meat had gone off. It doesn’t smell good.
British English informal
(to stop liking): Jim went off his girlfriend after he met another girl.