"A sitter is a term used in football (soccer) to describe an excellent goalscoring chance for a particular player in a team, one that is almost impossible to miss. For example, being 5 yards away from goal with the ball and with no opposition player and/or goalkeeper nearby. The term derives from the implication that the chance is so simple that it could be scored sitting down. " Keeper had pretty good position and the near post covered. Not a sitter.