The word fancy, meaning "decorative", is an adjective.
It means it's expensive
some one who fancy's charlie
Fancy is an adjective with no real meaning in terms of tuna salad. If the most basic tuna salad is tuna and mayo someone could add celery and call it fancy.
Other words meaning "not very fancy" include: cheap plain Spartan undecorated everyday (clothing) unadorned
Prone to make excursions; wandering; roving; exploring; as, an excursive fancy.
Basically a fancy or expensive dish; the type you see in restaurants.
Use the internet
That is the correct spelling for "fancier" (adjective meaning more fancy or ornate, or noun meaning a connoisseur or aficionado).
Exotic, fabulous, extravagant, elaborate, decorative, intricate, ornamental, embellished, classy Or another meaning of fancy can include synonyms like: whim, thought, idea, desire, urge, notion, impulse A third meaning: delusion, dream, vision, fantasy, daydream, chimera