An indicent where you have just done or accomplished something incredibly good, but instead of going to a party to celebrate this you go home and masturbate your ass off. You just did something incredible so that makes you extra happy, thus turning you on more.
A goal celebration happens when a goal is scored by a player, usually leading him to an orgasm. The team mates will often join the orgasmic session yelling and jumping around, grabbing and molesting him (in a good way).
Sometimes this goes to far, with the team mates jumping on him, incapable of holding themselves.
An injury to an athlete after a big play or after scoring points for the team as a result of celebrating the play or score. Occasionally seen in football after a field goal or TD, or after a goal in a soccer game. Can be a minor or major injury.
After doing celebration dances, our kicker suffered a minor back injury and our defensive end had a serious knee injury. Each had a celebration injury.