1. A cup of tea 意中人，想要之物；轻而易举之事

1) She's not my cup of tea. 她不是我的意中人。

2) Riding horse is a cup of tea for me. 骑马对我是再简单不过的事了。

链接：

a piece of cake：轻而易举之事

2. A leg up 占上风

All Andrew's hard work is paying off. He's a leg up on the rest of his competitors.

安德鲁的努力是有报答的，他在与对手的竞争中占了上风。