He's too clever by half , if you ask me.

恕我直言，他未免聪明过头了。

《牛津词典》

Tip 6: Don't be too clever by half.

提示6：不要一知半解、自作聪明。

youdao

Now, this solution feels too clever by half.

现在，这个办法让我感到未免太聪明了。

youdao

Which means that the deal may turn out to be too clever by half.

BBC: No magic potion for eurozone banks

And you've really savaged Mitt Romney for changing his mind, and I'm wondering if you don't run some risk of looking kind of too clever by half here.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

But Gordon Brown is too clever by half.

ECONOMIST: Tax