(in football (soccer) 足球 a goal that is scored by mistake by a player against his or her own team 乌龙球；射进自家球门的球 Vega scored an unfortunate own goal when he slipped as he tried to clear the ball. 维加想把球解围时脚下一滑，不幸自摆乌龙。
something that you do that achieves the opposite of what you wanted and that brings you a disadvantage 帮倒忙的事；无意中让自己吃亏的事