A : Did you hear? He's getting married to a woman twelve years younger than him.
B : Yeah, they've been going out for a long time.
A : What? You guys knew about this and kept it from me?
B : Well, they were all hush-hush about it. Actually, I was dying to say that.
I'm dying to + 동사 ~하고 싶다
I'm dying for + 명사~을 간절히 바란다