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.
Goal Celebration example:
*Player 1 scores a goal.
*Player 1 starts running and yelling to the cameras.
*Player 2 grabs him.
*Player 3 slaps player 1's ass.
*Player 4 and 5 join the session by taking player 1 down.
*Player 6 jumps on player 1, while player 1 is lying on the floor still screaming and having an orgasm.
*All team mates orgasm with player 1.
*Player 1 gets up and thank them and the crowd.