Now I'm definitely not a happy bunny.

现在我绝对不开心！

I'm not a happy bunny. You see … Something awful happened today.

我并不高兴。你看… … 今天发生了一些糟糕的事情。

If you're not a happy camper or you're not a happy bunny, it means you're not pleased with the situation.

如果“你不高兴”或“你不开心”，这表示你对这种情况不满意。

You can just say: " Oh, I'm not a happy bunny today."

你可以说：“哦， 我今天不是一只快乐的兔子。

" a happy bunny" , you'll be surprised to hear is " not a happy bunny" .

“a happy bunny” ，你会惊讶地听到是“not a happy bunny” 。