"不给就不给!"英语怎么说?

Forget it!

没有直接翻译,要看情景对话的具体情况,给几个参考:you never get it !
no way let me give it to you!
i said no and still on!
i don;t give it to you!
i insist on no!

I won't give it to you. Period!

You can wait till the cows come home

just forget about it!