Unparliamentary Language
Unparliamentary language is language that breaks the rules of politeness in the House of Commons Chamber. Part of the Speaker's role is to ensure that MPs do not use insulting or rude language and do not accuse each other of lying, being drunk or misrepresent each other's words. Words to which objection has been taken by the Speaker over the years include blackguard, coward, git, guttersnipe, hooligan, rat, swine, stoolpigeon and traitor. The Speaker will direct an MP who has used unparliamentary language to withdraw it. Refusal to withdraw a comment might lead to an MP being disciplined. MPs sometimes use considerable ingenuity to get around the rules; for example Winston Churchill famously used the phrase "terminological inexactitude" to mean "lie".

Unprinted Papers
Unprinted Papers are papers laid before the House but not ordered to be printed by it as House of Commons Papers. They include a large number of draft Statutory Instruments, reports of nationalised industries and some accounts etc. Many of these papers are actually published by the Stationery Office or the organisations concerned. Unprinted papers are public documents and can be consulted by the public in the House of Lords Record Office without restriction and copied or faxed by the House of Commons Information Office (for which a fee is payable). There are on average 2000 per year.

Courtesy of www.parliament.uk