The Collaborative International Dictionary of English v.0.48:

Crepitate \Crep"i*tate\ (kr?p"?-t?t), v. i. [imp. & p. p.
   Crepitated (-t?`t?d); p. pr. & vb. n. Crepitating
   (-t?`t?ng).] [L. crepitatus, p. p. of crepitare to crackle,
   v. intensive of crepare to crack. Cf. Crevice.]
   To make a series of small, sharp, rapidly repeated explosions
   or sounds, as salt in fire; to crackle; to snap.
   [1913 Webster]