What's the meaning of "The coffee isn't coffee coffee"?


In Nichijou there is a scene where a random character says,

> The coffee isn't very coffee coffee

Is this a pun? What's the meaning of these sentences? Even her friend asks
too.

[![This coffee isn't very coffee
coffee](https://i.stack.imgur.com/hTLOum.jpg)](https://i.stack.imgur.com/hTLOu.jpg)
[![What does not coffee coffee even
mean?](https://i.stack.imgur.com/4Q0y8m.png)](https://i.stack.imgur.com/4Q0y8.png)
[![It's not coffee
coffee!](https://i.stack.imgur.com/OK4DTm.png)](https://i.stack.imgur.com/OK4DTm.png)

Relevant video on [YouTube](https://www.youtube.com/watch?v=oIfigZMdwuQ)




There's no pun. She is using "coffee-coffee" as a made-up adjective to
describe that the coffee she is drinking doesn't have properties of coffee,
and as you can tell from her friend's response, it's not standard Japanese
(she could've just said something like "This doesn't taste like coffee."). The
subtitle uses the phrase as-is, but something more English could be something
like "This isn't very coffee."

The gag of this skit is that Girl B drinks and agrees with the fictional word,
despite no description of what it means. I feel this isn't supposed to be
funny, but more closer to something the viewers can agree to, like when eating
out with friends and trying to describe what you just ate/drank, but cannot
find the right words for it (thus just saying something like "coffee-coffee").




There's no pun. She is using "coffee-coffee" as a made-up adjective to
describe that the coffee she is drinking doesn't have properties of coffee,
and as you can tell from her friend's response, it's not standard Japanese
(she could've just said something like "This doesn't taste like coffee."). The
subtitle uses the phrase as-is, but something more English could be something
like "This isn't very coffee."

The gag of this skit is that Girl B drinks and agrees with the fictional word,
despite no description of what it means. I feel this isn't supposed to be
funny, but more closer to something the viewers can agree to, like when eating
out with friends and trying to describe what you just ate/drank, but cannot
find the right words for it (thus just saying something like "coffee-coffee").

