Definify.com

Webster 1913 Edition

Verb.

To cause to make a sharp twanging sound; to twang, or twangle.

Addison.

, a corruption of twang.

twank ‎(third-person singular simple present twanks, present participle twanking, simple past and past participle twanked)

(transitive, dated) To cause to make a sharp twanging sound.
- Joseph Addison
  London has the privilege of disturbing a whole street for an hour together, with the twanking of a brass kettle or frying-pan.