File:Briganti 1862 from Bisaccia.jpg Banditry wani nau'in laifi ne da aka shirya ta hanyar aikata laifuka da suka shafi barazana ko amfani da tashin hankali. Mutumin da ya shiga aikin 'yan fashi an san shi da ɗan fashi kuma da farko yana aikata laifuka kamar ƙwace, fashi, da kisan kai, ko dai a matsayin mutum ɗaya ko cikin ƙungiyoyi. Banditry ra'ayi ne mara ma'ana game da aikata laifi kuma a cikin amfani na zamani na iya zama daidai da ƙungiya-ƙungiya, ɓarayi,, da ɓarayi . Kalmar ɗan fashi (wanda aka gabatar da Ingilishi ta hanyar Italiyanci kusan 1590) ya samo asali ne daga farkon aikin shari'ar Jamus na haramtattun masu laifi, wanda ake kira *bannan ( haramcin Ingilishi). Kalmar doka a Daular Roman Mai Tsarki ita ce Acht ko Reichsacht, wanda aka fassara shi da " haramtacciyar sarauta ".[ana buƙatar hujja] A cikin Italiyanci na zamani kalmar daidai "bandito" a zahiri tana nufin haramtacce ko wanda aka hana. The New English Dictionary kan Historical Principles (Ned) ayyana "ɗan fashi" a 1885 a matsayin "wanda aka proscribed ko haramta .