Not in the slightest.

一丁点儿也不是。

He was not in the slightest degree interested.

他丝毫不感兴趣。

I'm not in the slightest degree interested in geometry.

我对几何丝毫不感兴趣。

I would be delighted and not in the slightest bit envious.

我将非常高兴，不会有一点点的嫉妒。

He was not in the slightest degree interested in this match.

他对这场比赛一点都不感兴趣。