burn off

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb intransitive To dissipate as the result of heat.
• verb transitive To cause to dissipate by applying heat.
• verb transitive, intransitive, oil To dispose of unusable explosive natural gas from an oil well by burning it as it emerges from the well.
• verb transitive, intransitive, television To fill low value air time with programming not suitable for its original purpose.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb use up (energy)
• verb clear land of its vegetation by burning it off