From their point of view no, they are not. There are many types of fans of sports clubs and so called "hooligans" and casuals are two different ones. Casuals are usually not involved in riots on stadiums etc. and rather use the approach to blend in with "civilians" so they can get undetected by the police from one point to another and possibly engage in a fight with rival fans without alarming the police. On the other hand "hooligans" are other fans who openly participate in fights/riots without taking much thought on the police.
Chat with our AI personalities
The Chancelor of Cambridge University, date unknown (pre 1953) as in the article by Sean Fagan at http://jottingsonrugby.wordpress.com/2013/01/22/rugby-football-hooligans-and-gentlemen/
we had a casual day in the office today. yesterday, we had a free casual day at school.
it means: "that person is casual".
it is a toga
as an adjective, it is simply "casual" you could also use "ocasional". If you mean clothing, you could use "caso" or ropa deportiva"