"Evil pits." The eighth circle of Hell mentioned by Dante in his Inferno. It contains ten pits (bolge) and is figuratively used to refer to any cesspool of filth or iniquity.
- Cobham Brewer, E. (2001). The Dictionary of Phrase and Fable. Cassell reference.
- Cooper, J.C., ed. (1997). Brewer's Book of Myth and Legend. Oxford: Helicon Publishing Ltd.