Its the definition for being shook but like a kpop idol. To be exact if you are Jeon Jung Gok (BTS)
Rapmon: YOU GOT NO JAMS
Jungkook: *shook* (He is so Jungshook)
The face BTS' Jeon Jungkook makes when he is spacing out or called 'oppa' (term used by females to address older males)
-Omg! Look at Jungkook. He is Jungshook!
-Boi, what did they tell him this time?