own goal
US /ˈoʊn ˌɡoʊl/
UK /ˈoʊn ˌɡoʊl/
1.
a goal scored by a player accidentally putting the ball into their own team's net
:
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The defender scored an own goal in the final minute of the match.
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It was a clear own goal, no doubt about it.
2.
an action that is intended to help but that ends up harming one's own interests or cause
:
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His controversial remarks turned out to be an own goal for his political campaign.
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The company's new policy was an own goal, alienating many loyal customers.