cleanskin
n.— «The Times said that at least two of the men had just returned from Pakistan, but none were on the files of security services. This meant they were “cleanskins”—intelligence parlance for terrorists with no previously known link to suspicious groups, and thus incredibly hard to track down before they strike.» —“Model citizens, ruthless killers” in London, England TodayOnline (Singapore) July 14, 2005. (source: Double-Tongued Dictionary)
Further reading
Is there such a thing as a “neutral” accent, and if so what does it sound like? And that quirk in the way southern Californians talk about freeways. They’ll say things like take the 405 and get on the 8. Why the definite article...
Floordrobe is the new word for an old habit: piling your clothes on the floor instead of putting them away. The Oxford English Dictionary recently added an entry for it, defining floordrobe as “an untidy heap of discarded clothing left on the floor...