Hello! Can you explain the meaning of this? About what Jungkook said to Jimin “건강하란 말이야 어?”, please? I see a lot of Korean fans like this and I don't understand why they like it so much. Thank you so much!
Hello there, thanks a lot for this message! It is something I wanted to address but didn't find the opportunity yet so here it goes.
First off, I'll start with a side note and bit of a longer intro by saying that the exchanges between Jimin and Jungkook that night felt overall very intimate, very loving and caring. It truly made me smile and made my heart melt a little.
Jungkook went from Jimin hyung! (*full smile mode*)
Then in true Jikook fashion, we got Jungkook instantly teasing or getting playful by greeting Jimin in the high polite form, which is something that Jimin and Jungkook have become known to do between the two of them. I already addressed it shortly once but as I am seeing it being discussed more and more I might dedicate a whole post to this with more examples. In short once again, by talking to each other in an unnecessarily highly polite manner, Jimin and Jungkook play into the situation which they are in: in front of an audience on a live, or alternatively in front of cameras and crew (and potential future audience). This puts them into the position of co-workers and into the context of a "professional" environment, which requires politeness. However them being as close as they are, it is safe to assume there is not a single moment they are formal with each other, thus making it super funny when all of a sudden they switch into a very polite and respectful language of two colleagues from some department of a company 😄 To draw a parallel for English speakers to understand this better, it is kind of similar to a situation if someone started calling their best friend 'sir' or 'madam' when in public. More on this maybe later in another post...
To address your specific question, this is a moment from the other spectrum of Jikook interactions.
Here Jungkook drops honorifics and addresses Jimin very casually. It is also important to take into consideration the way he says it. He changes his tone to very casual and caring (and scolding, in sort of 'I am frustrated if you don't listen' way) He starts off by saying:
"Jimin hyung work hard okay...! Jimin... (*drops honorifics here) Be healthy *hm*! You gotta be healthy *어*!"
(said with low formality + important to note that this '어' *oe* sound is used only among friends and considered rude if used when speaking to older people or someone who requires higher politeness than casual language; and in combination with Jungkook's overall tone it emphasizes the scolding, loving and intimate nature of the sentence)
Lastly, Jungkook finishes this off with:
"People have to be healthy..." (still in casual low polite form)
So basically, this whole part sounds loving and scolding at the same time with a causal tone similar to a boyfriend style. That's why Korean fans loved this moment so much!

















