grin like a Cheshire cat
动词 v.
英文释义
动词 v.
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To smile broadly, especially in a self-satisfied way.
— John ended the set with a beautiful serve, an ace, and could not help grinning like a Cheshire cat.
词形变化
词源
Attested since at least the 1780s. The reason why Cheshire was combined with cat is disputed: see here for more information.
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数据来源: Wiktionary