This informal British expression means being involved in dishonest activity, usually to get money. It often suggests cheating over expenses, accounts, benefits, or payments rather than stealing something openly.
What do we know about its origin? The expression is linked to fiddle in the sense of a fraud or dishonest scheme. The verb can also mean to cheat or change information dishonestly. However, the deeper origin of this dishonest sense is uncertain. It is better to acknowledge that uncertainty than present a colourful story as a proven explanation.
The useful connection for learners is not violin playing, but dishonesty. Someone who changes financial records to hide missing money might be described as being involved in a fiddle.
Examples:
- They discovered that the manager was on the fiddle, claiming expenses for journeys he never made.
- I think that contractor is on the fiddle: he has charged us twice for the same work.
A related use of the verb appears in this sentence: She fiddled the accounts to hide the missing money. Here, the verb describes the dishonest action itself.
Use it carefully. This is not simply a way to describe a mistake or a high price. It suggests deliberate dishonesty, so calling someone this amounts to an accusation. In formal writing, describe the specific behaviour instead, such as submitting false expense claims.