The finicky little girl didnt eat the FIN of the fish because she thought it was ICKY
finicky is derived from word fine. A finicky eater always needs fine details about the menu before placing an order in a restaurant.
~fine+picky=Finicky: one who picks or is too particular about fine details that are unimportant.
finicky= A finicky person wants everything extremely fine, i.e he is too particular.
difficult to please children by giving a nick cap for a nike cap
Nicky wants everything fine