It's short for "A Nigelism" which is a grammatical expression describing when you repeatedly try and clutch at some sort of moral high ground by saying you don't care about something when you most obviously do.
Name erroneously credited to Millsmall fans it is actually because of the well known inventor of the late 19th century Sir Nigel Sweet-F-A-Phelps-Glazier who was knighted by Queen Victoria in 1851 for services to glazing during the building of the Crystal Palace in Upper Norwood thus giving the area it's fictional name and fake sense of granduer and spawning a "football team" from the South Norwood/Croydon slums by the name of Crystal Relapse fc.
Comments
Go on then.
:-)