Fiddler

1. A violin.

2. A member of the violin family.

Nautical A guardrail used on a table during rough weather to prevent things from slipping off.

Informal Nonsensical, trifling matters: "There are things that are important/beyond all this fiddle" (Marianne Moore).

The act or an instance of cheating or swindling; a fraud.

To play a violin.

1. To move one's fingers or hands in a nervous fashion.

2. To occupy oneself in an aimless or desultory way: liked to fiddle with all the knobs and dials.

3. To meddle or tamper: a reporter who fiddled with the facts.

To commit a fraud, especially to steal from one's employer.

To play (a tune) on a violin.

To cheat or swindle.

To alter or falsify (accounts, for example) for dishonest gain.