What does "ワクワク" (wakuwaku) often express in Japanese slang?

When someone says "なんで?" (nande?), what are they asking?

What does "ムカつく" (mukatsuku) mean in casual conversation?


If someone says "オッケー" (okkee) to you, what does it mean?

What is the slang term "だるい" (darui) commonly used to describe?


Which phrase is often used in Japanese slang to say "I don't know" or "I have no idea"?


What does "カワイイ" (kawaii) mean in Japanese slang?


When someone says "ガンバ" (ganba) to you, what are they encouraging you to do?


What is the Japanese slang term "グダグダ" (guda guda) often used to describe?


If someone says "マジで" (maji de), what are they expressing?
