The phrase "dodgy penalty" means that the penalty given in a particular situation is questionable or suspicious in some way. It suggests that there may have been a mistake, unfairness, or dishonesty involved in awarding the penalty. Full definition
Arsenal were the better team for most of this away tie but it just would not quite click up front, while yet another in a season full of dodgy penalty decisions going against us meant that the Germans were able to score the opener and then hold on valiantly for what is a huge result for the team rock bottom of the Bundesliga. (justarsenal.com)
& then the two dodgy penalty calls and countless other chances that just didn't go are way! (justarsenal.com)
The eventual finalists Juve beat them over 180 mins by a solitary dodgy penalty. (justarsenal.com)