›something dishonest that is done in order to get money: tax/expenses/insurance fiddleA year later, he changed the rule, on the grounds that it was being used as a tax fiddle.
on the fiddle›involved in dishonest behaviour, usually to get money: One in two holidaymakers claiming for lost luggage could be on the fiddle, claims a leading travel insurance firm.
play second fiddle to sb/sth›to be seen as less important than another person or thing: There were times when security seemed to play second fiddle to how the security company wanted to present itself to the world.