a dark horse

意味

someone with unexpected talents or interests they rarely mention

意外な才能や趣味を人に明かさない人.

例文

1. 1Aisha is a dark horse; none of us knew she could play the violin.
2. 2Our quiet neighbour turned out to be a dark horse with several published novels.
3. 3What a dark horse you are, keeping your fluent Japanese a secret from us all!
4. 4That unexpected chess trophy revealed Ben as a dark horse; he'd never mentioned playing before.
5. 5I'd call our receptionist a dark horse: her pottery exhibition surprised everyone who knew her only at work.

文法

可算名詞。通常は単数で、be や turn out to be の後に置く。dark horse の前には a を付ける。

似た意味の表現