Questions about example sentences with, and the definition and usage of "Nunchi"

Q: Nunchi is the most essential skill to survive in Korea. It's more important than learning Korean. 'Nun' means eyes. 'Chi' means energy. Nunchi is that how fast somebody else can pick up a situation and meaning without the use of words. It's like an unspoken rule. The is no closest English word to Nunchi. Let's suppose your boss is not leaving work. It's past the closing hour, 6 pm. Even if you did your work, you should stay. Sometimes Nunchi is useful but mostly annoying and making me tired. I just want to say, "We are adults who can speak language!", "Don't give a nunchi!", "Just clearly say it!" soa natural?