[dblshot]

A quisling is a traitor, especially one who collaborates with an enemy occupying force for personal gain. The term arose because in World War II, Vidkun Quisling, a Norwegian politician, volunteered to help the occupying Nazis rule Norway for Germany.

[Gaffer]

Yep...where the word came from.

Quisling was a monster who secretly ‘helped’ Jews to escape the Nazis by getting them all at a departure point and then tipping off the Nazis and then robbing all their valuables.