not (one's) long suit(redirected from not his long suit)
not (one's) long suit
Not something one is particularly adept at. I'd avoid going for humor in your speech—jokes are not your long suit. Social etiquette is definitely not my long suit.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
not your long suit
If something is not your long suit, you are not good at it. Note: The following expressions refer to the four suits in a pack of cards: diamonds, hearts, clubs, and spades. Tact has never been my long suit. Charm was never Michael's long suit. Note: If a large number of a player's cards belong to a particular suit, you can call that suit their long suit.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012