Hello!/ Hi there!/ Hi man!
How are you doing?(老友记里乔伊的口头禅)
What's up,man/buddy/my man/guy?
what's going on,man?
How is it going?
How is the business?
How are you?
Anything new?
Is everything all right?
How have you been?
口语里面对自己的兄弟或男性好朋友多称呼作“man,buddy,fellow”,多看看电影,多说说,就会变的地道很多^^