(that's) a hell of a note
Surprising news, typically that which is negative or bad. There's supposed to be a blizzard this weekend? Ugh, that's a hell of a note. She hung up on me! Well, that's a hell of a note!
(a) hell of a note
Inf. a surprising or amazing piece of news. (Use caution with hell.) So you're just going to leave me like that? Well, that's a hell of a note! You forgot what I asked you to bring? That's a hell of a note.
hell of a note
n. a surprising or amazing piece of news. (Use caution with hell.) You forgot it. That’s a hell of a note.