A phrase used (often humorously) to end a conversation, perhaps abruptly, because it is becoming awkward or more personal or emotional than one is comfortable with, or has otherwise not gone as one expected, intended, or hoped. A: "But how do you really feel about these changes that are happening in your life? B: "Whoa, good talk, but it's time for me to go." Well, you're clearly not listening to me, so, good talk.