Everyone should know this already. It's been a known habit that Jungkook easily gets jealous over certain things and that he has a certain expression and gesture to show that jealousy.

And yes, it is a FCKING HABIT.

Actually, Jungkook would usually do the "Tongue-In-Cheek" thing and stare blankly at things like Taehyung would do.

Don't act like you don't know what I'm talking about. 😂

That there. The Bangtan member who actually created this "Tongue-in-cheek " trend was Suga, it was when he saw JHope talking with someone or when Jhope was talking. I'm so serious.

But anyways yeah. Even other international ARMY's pointed out Jungkook's jealousy and hints that he indeed was jealous.