Definition
Used when someone you were just talking about appears unexpectedly.
说曹操，曹操到
We were just saying how punctual you are, speak of the devil!
我们刚才还在说你有多准时，说曹操曹操就到！
I was just wondering why she hadn't been around lately, and speak of the devil, she called.
我刚才还在想她最近怎么都没来，说曹操曹操就到，她打电话来了。
"I was just thinking about looking for you yesterday, and here you are!" "Speak of the devil!"
「我昨天还在想要找你，你就来了！」「说曹操曹操就到！」