NAK

/nak/ , interj. [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! 4. A negative answer.