The portrait of the football hooligan, for instance, is left vague.
As the chorus comes, get ready to chant like a football hooligan.
When the newspapers and television hold forth about football hooligans it is usually to members of groups like this that they are referring.
The police have also taken on the football hooligans, the hippies, and the criminal gangs.
Arkan and his group, consisting of 1,500 people, were involved in a huge fight with the home team's football hooligans.
Once upon a time we were all law-abiding citizens, and now we've got football hooligans.
But do I think a gang of goose-stepping football hooligans are the answer?
Some football hooligans will be familiar with this one.
Police arrest 26 suspected football hooligans across Britain after a mass operation.
Let us look more closely at the football hooligans themselves.