Wiktionary
n. 1 An unkind trick 2 (context in the plural English) unethical or illegal tactics used against an opponent
WordNet
n. an unkind or aggressive trick
Usage examples of "dirty trick".
Or did that Zanni pull some kind of dirty trick in his translation?
Brugh played a dirty trick on me, but I've put over a few of them myself to get money for my department.
Bye and bye my cabby said: ``You done yourself a dirty trick that time, pal.
God played a dirty trick on me, giving me that cup from the cloud.
All right, so I'm a brat, I used a low-down, dirty trick: but if I hadn't, you'd be dead by now!
To make off with all the goods, dirty trick as it would be against your partners, would seem, out here and under these conditions, rather the natural thing to do.
He couldn't for a moment think of leaving Ismay in the lurch, quite apart from the fact that the Glassons and his own parents would probably hunt him down and kill him if he did such a dirty trick.
To note that Clark and Alonso didn't support the boycott either would only spoil a perfectly bad dirty trick.