1high tide; high water
2upsurge; peak of activity
3climax (of a story, a competition etc)
4to have an orgasm
Examples
wǒ我kuài yào快要dào到gāo cháo高潮le了。
我快要到高潮了。
I am reaching the climax.
你怎么确定你的女朋友没有假装高潮?
How can you be sure your girlfriend isn't faking her orgasms?
哪些原因可能导致男性高潮障碍？
What can cause orgasm problems in men?