no man's land
1. The area of unoccupied land that separates warring factions. Make sure not to go too far out into no man's land on this offensive.
2. A situation that is ambiguous due to uncertainty about how to proceed. This lawsuit is a bit of a no man's land—the Supreme Court may have to set a precedent.
3. An unowned, desolate and/or barren piece of land. Out past the mountains lies a no man's land with nothing but dirt and scrub bushes.