Definition
A quisling is a traitor who collaborates with an enemy occupying their country. It's essentially a synonym for 'collaborationist' but specifically references Vidkun Quisling, a Norwegian politician. The term is intensely negative, symbolizing betrayal and treachery. Think of it as the ultimate act of disloyalty during wartime. Unlike a simple negotiator, a quisling actively aids the enemy. It represents a complete abandonment of one's own people.