a bit dodgy
Appearing to be somewhat unsafe or dangerous; dubious; risky. This car looks a bit dodgy to drive in traffic. I don't think we should stay, the crowd in this bar seems a bit dodgy. The way the politicians run the country seems a bit dodgy to me.
dodgy deal
An agreement, arrangement, or business transaction that is or is suspected of being risky, dubious, dishonest, or corrupt in some way. Primarily heard in UK, Ireland. He was ultimately fined for the dodgy deal, which saw his company reap the rewards of large-scale investments without any tax burden.