Nufc
In short
Newcastle United Football Club is a professional English football team based in Newcastle upon Tyne that competes in the Premier League.
In plain words
It is a famous sports club from North East England. They play their home matches at the St. James' Park stadium.
A simple example
When fans wear black and white striped shirts to watch a match at St. James' Park, they are supporting NUFC.
Why it matters
The club is a major part of the local culture and economy in the Tyneside area. Success on the pitch brings international attention to the city.
Easy to mix up
Do not confuse the club with the city itself, although the team is the city's main sporting representative.