Cousin John

Etymology
From. Possibly derived from a "euphemistic phrase of excuse" (e.g., "visiting my cousin John" or "going to cousin John's house"), similar to modern use of "powdering one's nose", but this is unattested.

Noun

 * 1)  A place or device for urination and defecation: an outhouse or chamber pot.
 * 2) * 1735, Richard Waldron, "A Freshman Guide", in 1953, William Bentinck-Smith, The Harvard Book, p. 162:
 * 20. No freshman shall mingo against the College wall or go into the fellows' cuzjohn.
 * 1) * 1741, "The Customs of Harvard College", in 1851, John Bartlett, A Collection of College Words and Customs, p. 319:
 * 18. No Freshman shall call or throw any thing across the College yard, nor go into the Fellow's Cuz-John.*
 * *Abbreviated for Cousin John, i.e. a privy.

Synonyms

 * ; ; see also Thesaurus:bathroom and Thesaurus:chamber pot