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I'm sorry. It is an expression that means don't tell every body ... don't spill the beans. Usually used jokingly. I was just joking is all

No worry, I actually wanted to learn
i used to hear some foreign slang when I worked for American companies. But forgot all those. I just wanted to recall since I am now back to international arena.

I sometimes forget that my jokes don't translate well. Good luck with the new work.