i have no idea - The most annoying thing anyone can say. It’s like saying, 'I

The most annoying thing anyone can say. It’s like saying, 'I have no idea what I’m doing.'

"What’s your name?" "I have no idea." (His name is Bob.)

Teacher: "What’s 5+5?" Student: "I have no idea."

Friend: "Where are we going?" You: "I have no idea."