crackle

Short definition from Wiktionary

Noun

1. 1
   A prolonged, frequent cracking sound; a fizzing, popping sound.
2. 2
   A style of glaze giving the impression of many small cracks.
3. 3
   The fifth derivative of the position vector with respect to time (after velocity, acceleration, jerk, and jounce), i.e. the rate of change of jounce.
4. 4
   Synonym of crackling (“crispy rind of roast pork”).

Verb

1. 1
   To make a prolonged, frequent cracking sound which sounds like fizzing or popping.
2. 2
   To be full of tension or emotion.