惯贼

惯贼	guàn zéi	habitual thief
惯	guàn	accustomed to / used to / indulge / to spoil (a child)
贼	zéi	thief; robber / (bound form) traitor; subversive / (bound form) evil; wicked / sly; shifty; devious / (literary) to harm; to injure / (coll.) extremely; insanely; damn (common in NE China and Taiwan)