If you say that something is dodgy, you mean that it seems rather risky, dangerous, or unreliable. Predicting voting trends from economic forecasts is a dodgy business
marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dik"; "a wily old attorney"
disapproval If you describe someone or something as dodgy, you disapprove of them because they seem rather dishonest and unreliable. He was a bit of a dodgy character. = suspect
If you say that someone has a dodgy heart or knee, for example, you mean that that part of their body is not very strong or healthy. My heart's a bit dodgy