grin like a Cheshire cat

短语

常常无缘无故地傻笑

发音

AU

词形变化

grins like a Cheshire cat 三单 grinning like a Cheshire cat 现在分词 grinned like a Cheshire cat 过去式 grinned like a Cheshire cat 过去分词

释义与例句

v.
  1. 1.

    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.

词源

Attested since at least the 1780s. The reason why Cheshire was combined with cat is disputed: see here for more information.

来源：wiktionary