搞乌龙
gǎo​wū​lóng

to mess up

搞乌龙 搞烏龍 gǎo//wū​lóng
to mess up
To make a foolish mistake; to mess something up or create a misunderstanding through an error.
to score an own goal
To accidentally score a goal against one's own team (usually in football/soccer); by extension, to commit an embarrassing error that harms one's own side