While I have previously used the phrase “bad bank” for such ideas, over time I have come to dislike the title. A “bad bank” conveys the impression that this entity is to operate as a bank but has bad assets to start with. In fact, the idea is not to operate these entities as banks at all.
Resolution agencies set up as banks that originate or guarantee lending have ended up being future reckless lenders, notably in the case of Germany which has often aggregated stressed assets of its Landesbanken into bad banks. I would argue this has also been the story of Fannie Mae and Freddie Mac with respect to housing booms and busts in the United States.