expression
just kidding; not!
Colloquial phrase used after a statement to indicate it was a joke or not serious. Often said with a playful tone.
明日から宇宙旅行に行くんだ。なんてね。
I'm going on a space trip tomorrow. Just kidding.
実は宝くじが当たったんだ。なんてね。
Actually, I won the lottery. Not!