I jimin today

Made by BTS RM during an interview when asked about who runs late the most among the members. Everyone agreed that Jimin runs late most and RM said if you're late you jimin today

I jimin today, I am late today.

I Jimined today

I was late today

The BTS way of saying you were late

Boy: bro where were you?
Boy: sorry! I jimined today!
Boy: whatever