It seems like every Illinois fan has a different "most hated rival" based on where they grew up, when they went to the school, what sport they prefer, and when they became Illini fans. For example, being from the Quad Cities and being in Champaign when Bruce F***ing Pearl was at Illinois messing with Deon, I hate those Idiots Out Wandering Around more than anyone else.
Others will tell you Miznoz is our biggest rival. Others will say NW or Purdue or Indiana... Would be nice if we could just all settle on hating Indiana more than anyone else.
FIFY