The idiomatic expression "to get a little fancy" means to add some extra touches or details in order to make something more impressive, elaborate, or decorative. It implies that one is going beyond what is necessary or ordinary and adding some embellishments for effect. The phrase can be used both literally (e.g., "I decided to get a little fancy with my cake decorating") or figuratively (e.g., "He likes to dress up when he goes out, so he gets a little fancy").