nerve是“放肆、厚颜无耻、脸皮厚”之意，you have some nerve意思是你脸皮真厚

【例句】
He had the nerve to take the credit for my work.
他竟然抢我的功劳,真不要脸。

He didn' t have the nerve to ask her for a date.
他没有勇气约她出去。