Characters from this series have done this in three of the four episodes that I've watched. Here they do it twice within the span of under a minute. I don't get it. Is this referencing something?

20:52 - 21:39

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Sounds like an impersonation of W.C. Fields? Is he mentioned anywhere earlier as setup?

Sounds like an impersonation of W.C. Fields? Is he mentioned anywhere earlier as setup?

I don't believe so.