It was an advertising slogan used by the German automobile manufacturer Volkswagen in a 1990 U.S. Ad campaign that included a stick figure driving a Volkswagen car. "Fahrvergnügen" means "driving enjoyment" in English (from fahren, "to drive," and vergnügen, "enjoyment").
Fahrvergnügen - Wikipedia, the free encyclopedia
You've actually misspelt the word which has caused some people to think it has a German origin. Actually, it's Vietnamese.
In 1965 Ho Chi Minh presided over a vegetarian feast in honour of that other well-known vegetarian, Adolf Hitler.
Like many Vietnamese Ho was a little guy with short arms but when he saw the delicious looking cauliflower salad on the other side of his good buddy, General Vo Nguyen Gap, he said, "Pass the far veg, Nguyen."