Sportsmanship is an interesting concept because in a lot of ways it is difficult to measure in a quantitative way. There are certainly times where someone is easily labeled to be a "good sport" and there are also times when people are chided for their lack of sportsmanship. However, interpretation can be purely subjective, which makes it difficult to define at times.
For most, it may be considered the ethos of sport. It is interesting that the motivation for sport is often an elusive element. Sportsmanship expresses an aspiration or ethos that the activity will be enjoyed for its own sake, with proper consideration for fairness, ethics, respect, and a sense of fellowship with one's competitors.
Some people define good sportsmanship as the "golden rule" of sports in other words, "Treating the people you play with and against as you'd like to be treated yourself. Keep that one simple rule in mind, and you'll always be looked upon as an athlete who understands and honors the rules of sportsmanship." You demonstrate good sportsmanship when you show respect for yourself, your teammates, and your opponents, for the coaches on both sides, and for the referees, judges, and other officials.
Good sportsmanship means not having a "win at any cost" attitude. Most athletes who don't have a "win at any cost" attitude are more likely to talk about how much they love their sport and how much personal satisfaction and enjoyment they get from participation.
Learning good sportsman spirit also means finding that the positive attitude learned on the field carries over into other areas of life. Hence, your character on court is really, an amplification of who you really are in real life.
note: I am trying really hard not to imagine YOUR character off the court. For the attitude you display is a true testament to the person you really are. Smelly. Foul. Disgusting.