1. A person who excessively complains about a situation that does not merit the level of crybabyism associated with the situation.
2. A person who goes out of their way to complain about routine situations, making them bigger than what's called for.
See whiny crybaby
Guy 1: I need blue soap to wash my car!
Guy 2: This is red soap, but its for your car..
Guy 1: NO! I need BLUE soap! Wahhh!
Guy 2: Stop being a whiny crybaby.