Definition

Suspicious or untrustworthy; of questionable quality, potentially illegal, unsafe, or risky.

Examples

"That deal sounds dodgy to me—paying cash in a car park at midnight isn’t exactly reassuring."

"The wiring in this flat is a bit dodgy; I wouldn’t plug the heater and the kettle into the same socket."

"He bought a phone off a dodgy bloke outside the station, and it stopped working the next day."