House of Commons

noun2

1. •
   A session of the House of Commons.

   • Reckoning from 1802 till November 15, 1837, there were thirteen Houses of Commons — 1842
2. •
   (Canada, slang) An outhouse: an outbuilding used as a lavatory.

   • Right across western Canada, the "house of commons" is the biffey. Now that should tell you something about the way westerners feel about the goings-on in Ottawa. — 1987