on the fiddle
US /ɑn ðə ˈfɪdl/
UK /ɑn ðə ˈfɪdl/
1.
involved in dishonest or illegal activities, especially involving money
:
•
He was caught on the fiddle, taking money from the company.
•
Many politicians are suspected of being on the fiddle.
involved in dishonest or illegal activities, especially involving money