(noun)
in British usage, the action of cheating someone and obtaining money illegally through deception;
e.g. He and his colleagues planned this fiddle, and they alone must be made to repay the money.
(noun)
a structure such as a railing or a raised rim on the edges of furniture on a boat or ship that prevents things from rolling off;
e.g. The pen rolled and hit the fiddle as the ship tossed about.
(verb)
to play a violin (a fiddle), or to play something such as folk music on a fiddle;
e.g. He was content to fiddle on the stage as everyone else at the party danced.
(verb)
to move one's hands or fingers or fidget with something restlessly; to make minor adjustments to something, or to engage in aimless activity;
e.g. She tends to fiddle with bits of paper as she thinks.
(verb)
to swindle, cheat, or deceive someone, or to manipulate a situation in order to unfairly gain from it;
e.g. She attempted to fiddle the transaction and overcharge the customer, but she was unsuccessful.