Be somebody's strong suit spoken language noun phrase
Used to refer to something one's good or skilled at.
Volleyball's never been my strong suit.
Critical thinking is Susan's strong suit, so we can consider inviting her to join our debating team.
Mathematics has never been my strong suit. When I was in high school, I usually got bad scores in math.
Design is her strong suit. I'm always very impressed with her works.
Strong body, mind or will
By physical strength or brute force
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.