[from the ASCII mnemonic for 0010101]
1. On-line joke answer to ACK?: "I'm not here." 2. On-line
answer to a request for chat: "I'm not available." 3. Used to
politely interrupt someone to tell them you don't understand their
point or that they have suddenly stopped making sense. See
ACK, sense 3. "And then, after we recode the project in
COBOL...." "Nak, Nak, Nak! I thought I heard you say
COBOL!"
