A sly dog informal noun
A tricky or dishonest person
Stay away from him. He's a sly dog.
What a sly dog! He cheated my money.
To deceive or trick someone
1. To carry out something foolish or risky
2. To carry out a trick
If a person has the devil's own luck, he or she has extremely good luck.
A: Yesterday I won a $10 million lottery jackpot and today I won a car in a draw.
B: You have the devil's own luck.