too particular; fussy; picky
I was a finicky eater as a child and I have remained one to this day.
Fine + picky = Finicky: one who picks or is too particular about fine details that are unimportant. May sound like PICKY Finicky is derived from word fine. A finicky eater always needs fine details about the menu before placing an order in a restaurant. The finicky little girl didn’t eat the FIN of the fish because she thought it was ICKY