Yin fasa-ƙwauri shine jigilar abubuwa, bayanai ko mutane ba bisa ƙa'ida ba, kamar daga gida ko gine-gine, zuwa gidan yari, ko ƙetare iyakokin ƙasa da ƙasa, wanda ya saɓa wa doka ko wasu ƙa'idodi. Akwai dalilai daban-daban don yin fasa-kwaurin wasu suna safarar mutane, ƙwayoyin maye, miyagun ƙwayoyi da dai sauransu.Waɗannan sun haɗa da shiga cikin haramtaccen fatauci, kamar kasuwancin miyagun ƙwayoyi, cinikin makamai ba bisa ƙa'ida ba, karuwanci, fataucin mutane, garkuwa da mutane, cinikin dabbobin daji, satar fasaha, masu sata, shagunan sara, ƙaura ba bisa ƙa'ida ba ko ƙaura ba bisa ka'ida ba, kin biyan haraji, shigo da kaya hanawa, samar da haramtattun kayayyaki ga fursuna, ko satar kayayyakin da ake fasa-ƙwauri. Cin hanci da rashawa jigo ne na gama gari a cikin kowane adabi, daga wasan opera na Bizet Carmen zuwa littattafan leƙen asiri na James Bond (da kuma fina-finai na baya) Diamonds Are Forever and Goldfinger .