Zig-Zag was the codename of Eddie Chapman, a criminal imprisoned in Jersey for safe-breaking[?] in Glasgow. On the occupation of the Channel Islands, the Germans recruited him as an agent and despatched him to mainland Britain to commit acts of sabotage. He was turned and was used to feed misinformation to the Germans.
... or royal family.
Of the more specific uses of the term, the most common include:
1. A supporter of King Charles I of England during the English Civil War.
2. ...