psyched的意思是“兴奋的，激动的”，所以，psyched for you这个短语表达的意思是：“我真替你高兴”。因此，当美国人说“I'm psyched for you.”时，他/她要表达的意思就是:"I'm so happy for you."、"I amreally glad to hear about your good news."。
Shirley: Ben, I'm so happy! I've got the offer from that famous company.
Benjamin: Oh, wonderful! Honey, I'm psyched for you.
①I have been hired by Microsoft.
②I have signed with Google.
③You know what? I've got a job in Shanghai.
④I hear that you're going to work in a foreign company.
psyched adj. 兴奋的
The kids are really psyched about the vacation.
Yeah, I feel kinda bad for them, but I'm also really psyched.