ICP was the joke that you and you're friends had in the sixth grade. That joke that your parents would kill you if they over heard you. But, then, the summer comes and goes. You get off the bus on the first day of 7th grade and one of your friends tries to bring up the joke. You slap him and ask him what the hell is problem is. "Grow up," you say, "This ain't 6th grade no more,".
Then you tell a joke about a twelve inch pianist and the whole group dies of laughter.