buddy
ˈbʌdi noun
1 a friend [非正式] 朋友,伙伴 informal
我们是好朋友。
2 used to talk to a man or boy, especially one you do not know [美,口] 老兄〔尤用于称呼不认识的男子〕 AmE spoken
喂,老兄! 这是你的车吗?