SCOTUS: Trump vs Cook and "INM" meaning

I listened to the oral argument in "Trump v Cook", the attempted firing of a member of the governing council of the US Federal Reserve Board.  I kept hearing a reference to the initials "IMN".  One of the frustrating things, but an understandable one, of trying to follow an oral argument: the use of "inside baseball" shorthand often used by the Justices and the lawyers. 

I had to look it up:

In the legal context of the 2026 Supreme Court case Trump v. Cook, the acronym INM refers to the removal standard of Inefficiency, Neglect of duty, or Malfeasance in office. 

This standard is a central point of debate in the case, which centers on President Trump’s attempt to remove Federal Reserve Governor Lisa Cook. 

The crux of the case centers on the meaning of two words: "for cause".

Statutory Requirement “for cause”:
The Federal Reserve Act permits removal of a governor only “for cause,” but it does not define what “for cause” means. The parties dispute whether that standard includes things such as inefficiency, neglect of duty, or malfeasance in office, or whether conduct unrelated to official duties can qualify. (source HERE)