つい先日まで未年だったのにいつの間にか申年。もう羊は用無し、厄介者になってしまいました。
Oveja negra, persona que dentro de una colectividad o grupo establecido no sigue las líneas de conducta aceptadas; El hijo menor es la oveha negra de la familia.
A black sheep is a person who has done something bad, especially something which brings embarrassment and loss of respect to the family: He's the black sheep of the family. / I never heard anyone mention my uncle -- I think he was a bit of a black sheep.