Derby County fans believe , Wayne Rooney is trying to wind up Nottingham Forest, by referring to them has Notts Forest, this name is known to irk the faithful from the City Ground.
The name Notts was taken by Notts County, the other side of the river Trent, so the City ground club, are Nottingham Forest.

Yet when I post anything on Millers Mad, i normally put Notts Forest.