Neomu Lonely
Neomu lonely is a popular catchphrase by a famous K-pop idol, Lucas NCT. This catchphrase usually use by people who was having a trainee period but at the same time, your friend named Mark Lee debuted first and debuted again and again.
Example:

Lucas: I trained with Mark.

Mark: WHEEZE

Lucas: but he debuted first

Mark: WHEEZE

Lucas: neomu lonely

Mark: WHEEZE