The phrase "fancy as" is correct and usable in written English.
It is used to describe something as being very elaborate, fancy, or showy. For example, "She wore a dress as fancy as a ball gown."
But this summer, the museum's outdoor spaces has captured the public's fancy as well.
Perhaps it will prove a passing summer fancy, as fleeting as the sunshine.
For the president, Astana is the site for flights of architectural fancy as extreme as the continental climate.
"We work on whatever suits our fancy, as long as it is swinging for the fences," he said.
They're so grand and fancy: as soon as you step in one, you smell the rich international schoolkid ignorance.
As I left the meeting with Rick, I realized that this place was exactly my kind of fancy as well.
This is a simple version; you can vary the shapes and make it fancier, as preferred.
You can go as fancy or as simple as you like.
It can be as fancy or as simple as you wish.
The bow can be as fancy or as simple as you'd like.
That night, Friday, was the Ball's kick-off cocktail party at the fancy-as-fuck Le Méridien.
