burn off

Short definition from Wiktionary

Verb

1. 1
   To dissipate as the result of heat.
2. 2
   To cause to dissipate by applying heat.
3. 3
   To dispose of (unusable explosive natural gas from an oil well) by burning it as it emerges from the well.
4. 4
   To fail due to overheating.
5. 5
   To fill (low-value air time) with programming not suitable for its original purpose.
6. 6
   To expend energy resulting from metabolizing food.
7. 7
   To use up a resource in a nonproductive manner.
8. 8
   Cause to waste energy.
9. 9
   To speed past (someone), such as in a race, especially when first starting off.