burnout

Short definition from Wiktionary

Noun

1. 1
   The experience of long-term exhaustion and diminished interest, especially in one's career.
2. 2
   A person who has the experience of long-term exhaustion and diminished interest.
3. 3
   Someone whose brains have figuratively been burned out by drugs.
4. 4
   The shutoff of a rocket motor after exhausting its fuel or having been irreversibly throttled after the application of a planned delta-v.
5. 5
   The failure of an electrical device, usually through overheating due to the application of excessive power.
6. 6
   Use of the throttle to spin the wheels of a vehicle being held stationary, causing the spinning tires to produce smoke and burn rubber.