conk out

(verb) stop operating or functioning. Synonyms: fail, go bad, give way, die, give out, conk out, go, break, break down. Examples: "The engine finally went." "The car died on the road." "The bus we travelled in broke down on the way to town." "The coffee maker broke." "The engine failed on the way to town." "Her eyesight went after the accident."

(verb) use up all one's strength and energy and stop working. Synonyms: poop out, peter out, run down, run out, conk out. Example: "At the end of the march, i pooped out."