The practice of reading gruelling works of literature, such as War and Peace, Finnegan's Wake or The Gulag Archipelago simply to say you've done so. I myself am a recovering literary masochist; it becomes an addiction. At one point, I'd regularly read a Dostokevsky or Tolstoy novel in a single weekend.

This term might also be applied to authors who've written entire novels without using the letter 'e', e.g. "A Void" by Georges Perec, or similar feats.