Artificial intelligent assistant

What does 「どっか」 mean? In this clip at 19:50, it sounds like he is saying, "Nante na! Kore _dokka_ no kiza na yatsu ga itteta serifu" ("This is just something a ____ pretentious guy said"). Is it indeed ? What does that mean? I tried looking up in 2 online dictionaries but I did not find a clear definition. Is it at all related to phrases like or ? Since it is followed by the particle , I would imagine not...

is the short spoken form of which means `somewhere`.

There is also an entry here: <

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