I didn't mean it. I was only kidding.

我并没有这个意思，我只是开开玩笑而已。

《牛津词典》

"Friendship is a sacred thing, " said Kimmel (who looked like he was only half-kidding), "and I believe Facebook is ruining it."

“友谊是神圣的，”Kimmel 表示（他半开玩笑的说），“我相信Facebook正在毁了它。”

youdao

There now, I was only kidding.

好了，我只是但是开个玩笑。

youdao

But I'm only half-kidding about that, because I think that's going to be the next thing.

NPR: Do Movie Audiences Have a Tin Ear?