Give away the game

Need Help!

"Business managers should not give away the farm - they should not divluge information that could damage themselves."
What does "give away the farm" mean?
Thanks!

This is not clear to me. 'Buy the farm' means die, originally in military action. It could be extended to mean condemn oneself. 'Give the game away' means reveal what happened. Perhaps the writer has fused, or confused, the two phrases. Any other ideas?

The phrase "don't give away the farm" can be looked at from a negotiation point of view.

For instance, if you are anxiously selling your home and you have it listed for $499k and a buyer offers you $425k you are tempted to close the deal but you should not "give away the farm" so quickly without first negotiating a little more.