asymmetric cut
any hairstyle where the head hair is cut in such a way that it does not have a harmonious relation and therefore lacking of symmetry between it, thus making the one side appears longer than the other
en-GB/ˌeɪsɪˈmɛtɹɪk ˈkʌt/
en-US/ˌeɪsəˈmɛtɹɪk ˈkʌt/