P.S. of Word Nerdery

Because I can't help myself:

quis⋅ling

–noun

a person who betrays his or her own country by aiding an invading enemy, often serving later in a puppet government; fifth columnist.

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Origin:
1940; after Vidkun Quisling (1887–1945), pro-Nazi Norwegian leader

Okay, first off, that is so weirdly specific. And how humiliating is that? He must feel like a Benedict Arnold... or a Judas? Oh wait, where were they in the thesaurus entry for collaborator? Nowhere to be found. Plus, how many people need a word to describe one who serves in a puppet government?

Buried beneath a number of articles on tips for jogging with your pet, I found the elusive running dog definition:

Running Dog is a literal translation into English of the Chinese/Communist insult 走狗 'Zou Gou', meaning lackey. Its first recorded use in English was in 1937.

Running Dog is also the title of a 1978 novel by Don DeLillo. At its center is a rumored pornographic film of Adolf Hitler, purportedly filmed in his bunker in the climactic days of Berlin's fall. The novel follows a journalist as she tries to penetrate a murky black market of wealthy erotic-art collectors in order to locate the film. The tale grows increasingly wild and violent as she closes in on this bizarre grail.

Umm... good?