Some/most of these have probably already been posted, but anyway:
"Five minutes before I die, I will become a Milanista so that at least of one of them will die"
"What the result of Milan - Juventus will be? I don't know, I am not interested in teams at such a low level"
"AC Milan? What....?"
"Of course my children support for Inter. If my son would be a Milanista, I would look straight at him to see if his eyes are really blue, if his hair is really black and I would do a blood test. Becauseif my son doesn't support Inter, I can't trust my wife anymore"
"I am against all forms of racism, but my daughter will never marry a Milanista"
"Milan broke a personal record by winning so many matches? I can't remember even one of them, I only remember the matches where Milan loses"
"There are two big teams in Milano. Inter and Inter Primavera"
"After I shake the hand of a Juventino, I always count my fingers"
"Inter has been born by leaving the group of Milan. This shows what you can make out of nothing"
"Juventus using doping? When I saw Vialli looking like an alien,Inzaghi scoring 18 goals and Juventus dominating in Europa, I knew something wasn't right"
"Dell'Alpi empty? You can buy games, but you can't buy real fans"
"Gattuso in the national team? Well....even beautiful cities have sewers"
"The best cure to get better after an illness was watching Milan - Cavese 1-2 in the Serie B in 1983"
"A prognostic for Juventus - Milan? I hope they will both lose"
"If it's not possibile for Inter to win the scudetto, I will certainly support the other team in Milano: S.S. Scarioni, the club I used to play for when I was young"
"Milan first in the competition? That must be an typographical error"
"The most sympathetic Interista? Giacinto Facchetti. He once scored a goal when there was much mist, then he went looking for me to hug me.It took him 3 minutes to find me"
"The biggest mistake Inter ever made? To sell Roberto Carlos and to not buy Platini. He was almost ours"
"The president wants a 3-0 victory against Milan? I am more generous. I would accept also a 1-0 in the last minute from an own goal"
"I am afraid Juventus is like a disease that young children can get"
"I am sorry for my parents. But between their two pictures, I always carry one of Ronaldo"
"Am I afraid of Milan? Yes, I am very afraid they will stay in the Serie A this season"
"The greatest joy? Easy. Milan in B. And not once, but twice. Once after paying, once for free. I think that each time you go in Serie B, it's like losing 5 scudetti".
"Hope for the future? I'd love someone to see me in the streets and shout at me: Peppino champion of Italy! I dream about the scudetto. And, since we're at it, Milan in B again."
During a meeting, in front of 300 people the Monday after a Milan v Inter 0-3 in Serie A 1997-98:
"Before I contribute to the debate, I'm asking you to stand up, for a very serious moment. We have to commemorate something. (At this moment everyone stood up, feeling a bit worried). Now, what I want to say is: Who don't jump is a rossonero!"
edit: And I look 3 posts up and they're all basically there