Breed of rowdy football supporters who:
1. Support their team through non-stop singing (most important) and big displays (tifos) involving flags, banners, flares, smoke bombs, fireworks, balloons, ticker-tape and the like.
2. Fight against Modern Football
which they feel hinders their ability to support their team properly. Ultras can be very confrontational towards stewards/police who try to prevent them from supporting their team.
Ultras, despite what Danny Dyer
tries to tell you, are not the same as hooligans, although they aren't angels who just want to wave a few pretty looking flags around either.
Being an ultra is a way of life, it's 24/7. Punks are punks, goths are goths and ultras are ultras.