The meaning of "Picky" is when you are very choosy, or fussy. Example: I give you a plate of food, but you end up pushing half of the food away becasue itdosen't look good or you don't like it.

It means, hard to please, choosing one over another, etc.

It means "choosy". Did a guy say you were picky? It means you are easily put off by small, insignificant things.