A pickpocket; a person who stealthily steals wallets or items from others' pockets, often in crowded places or on trains.
電車でスリに財布を取られた。
My wallet was taken by a pickpocket on the train.
観光地ではスリに気をつけてください。
Please watch out for pickpockets at tourist spots.
若い男性がスリの疑いで逮捕された。
A young man was arrested on suspicion of being a pickpocket.