i know, you know, we know, lee know. it refers to the popular phrase used by lee know of the popular 4th gen south korean boy group, stray kids. also commonly used by stays, stray kids’ fans.
This is a common phrase known by fans of 4th gen south- korean boy band "Stray Kids". This means :
"I know, We know, You know, Lee know." It is also found in the song "The tortoise and the hare" by Stray Kids.
Stays (The SKZ fandom) say this often as an inside joke.