long suit, one's

long suit

A subject, activity, or field, at which someone is particularly skilled or adept. Working with computers was never my long suit, so this receptionist position is going to be a real challenge for me. Movie trivia is one of Sam's long suits, so I think we should ask her to be on our pub quiz team.
See also: long, suit

long suit

One's strong point or advantage, as in Organizing has never been Nancy's long suit. This expression alludes to whist, bridge, and other card games in which holding numerous cards in a single suit may convey a strong advantage. [c. 1900]
See also: long, suit

long suit, one's

One’s particular strength or advantage. This term comes from whist and related card games, including present-day contract bridge, in which holding a hand with numerous cards in a single suit may convey a strong advantage, particularly if that suit is the trump suit. The term began to be transferred to other enterprises about 1900.
See also: long