Crazy Vuk's border (Serbian: Међа Вука манитога/Međa Vuka manitoga), sometimes also called Dukljan's border (Дукљанова међа/Dukljanova međa) is remains of a border wall in Montenegro[1]. It follows the line Dubrovnik-Bijela gora (above Grahovo)-Cuce-Kčevska planina-Ostrog-Razbijeni vrh (Bijelopavlići)-Donja Morača-Kom[1].
Serbian poet Matija Bećković wrote a book of poems of the same name.