article_snippet: It's a traditional sign of discontent among supporters in Spain, adopted in football from bullfighting.
article_snippet: In that 'sport' It's seen as a positive thing, with spectators waving handkerchiefs to encourage the president of the fight to award the fighter a part of the bull (e.g. an ear, or a tail) as a reward for a good performance.
article_snippet: It's not unique to Real Madrid, but they are the team you associate It most with.