superbank

noun

su·​per·​bank ˌsü-pər-ˈbaŋk 

plural superbanks

: an extremely large bank

She was outspoken in her opposition to the spate of mergers and acquisitions, beginning in the early 1980s, which created the current system of "too big to fail" superbanks.

—Paul Vitello

Word History

First Known Use

1914, in the meaning defined above