Nothing - it looks like some kind of abbreviation instead of an idiom.
Twin
This is a term used when someone turns red (blushes) because they are embarrassed.
NME was created in 1952.
Your hair turns gray.
Your face usually turns red when you are embarrassed, so this phrase means that someone was ashamed of something.
NME TV was created in 2007.
NME Radio was created in 2008.
NME TV ended in 2012.
NME - framework - was created on 2007-03-01.
Beat Up the NME was created in 1997.
It is not an idiom, it means your nose is itching.
It's not really an idiom. It means "what are you thinking about."