The idiom "not know jack" means to have no knowledge or information about something. It is often used to express a lack of understanding or familiarity with a particular subject or situation.
For example, if someone asks you about a topic you know nothing about, you could say "I don't know jack about that." It's a way of admitting that you have no knowledge or expertise on the subject.
The phrase "jack" in this context is a slang term that means "anything at all" or "nothing." So, "not know jack" literally means "not know anything."
Overall, this idiom is used to convey a sense of ignorance or lack of knowledge about a particular topic. It's a casual and informal way of admitting that you don't have the answers.
• Despite his years of experience, the lawyer didn't know jack about the new legislation.
• The new employee doesn't know jack about the company's policy, we need to give him some training.
• I don't know jack about cooking, I always burn everything I try to make.
• As a journalist, I can't afford not to know jack about the current political situation, I need to stay informed.
• I'm afraid I don't know jack about computer programming, could you help me with this code?
• He was supposed to be an expert in math, but he didn't know jack about calculus.
• Despite his years of experience, he was embarrassed to admit that he didn't know jack about the latest trends in technology.
• I'm sorry, I don't know jack about cooking.
• She claims to be an expert in fashion, but in reality, she doesn't know jack about it.
• I don't know jack about politics, but I still have to vote in the upcoming election.
• The new employee claimed to have experience in marketing, but during the presentation, it was clear that he didn't know jack about it.
• He tried to explain the new software to me, but I still don't know jack about it.