on the fiddle

US /ɑn ðə ˈfɪdl/
UK /ɑn ðə ˈfɪdl/
"on the fiddle" picture
1.

做手腳, 搞欺詐

involved in dishonest or illegal activities, especially involving money

:
He was caught on the fiddle, taking money from the company.
他因從公司拿錢而被抓到做手腳
Many politicians are suspected of being on the fiddle.
許多政客被懷疑做手腳