Maybe 'Unmentionables'?
//Even the word 'trousers' was too shocking to say, so a number of different euphemisms for these garments were coined in the late 18th and 19th centuries. Apart from unmentionables, there's also: inexpressibles, ineffables, inexplicables, indescribables, etceteras, indispensables, unimaginables, innominables, unwhisperables, unutterables, unprintables and never-mention-'ems, plus the rhyming slang round-me-houses, and many other euphemisms in the Oxford English Dictionary.//
http://virtuallinguist.typepad.com/the_virtual_linguist/2011/02/unmentionables.html