conk out
     v 1: stop operating or functioning; "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" [syn: {fail}, {go bad},
           {give way}, {die}, {give out}, {go}, {break}, {break
          down}]
     2: use up all one's strength and energy and stop working; "At
        the end of the march, I pooped out" [syn: {poop out}, {peter
        out}, {run down}, {run out}]
Source: WordNet® 2.0