哥哥的好朋友英语可以翻译为 "my brother's good friend"。

"My brother" 是指哥哥,"good friend" 是指好朋友。这两个词都是来自英语的基本词汇,在英语中表示兄弟关系的词还有 "sibpng",表示朋友关系的词还有 "friend"、"companion" 等。

下面是一些例句:

My brother's good friend is coming over to our house tonight. (我哥哥的好朋友今晚会来我们家。)
My brother's good friend is very talented at playing the piano. (我哥哥的好朋友非常擅长弹钢琴。)
I'm going out with my brother's good friend to grab some dinner. (我要和我哥哥的好朋友出去吃晚饭。)