Landlord
Banned
How the hell has this one not made it in here yet
Because it's old and not an awful song but pretty average as far as potential for an opening/pump-up song for Nebraska's player entrance.
Since we're listing stuff that has no chance of ever being taken seriously, I like this (mostly just the beginning/chorus):
http://www.youtube.com/watch?v=KQUwACMwYVU