A Whigga/Whigger is a white person that wants to be black so bad. The word "Whigga" can only be written and said by white persons however rule 3 implies that black fellas may say Whigga if they allow the other white side to drop the N word.
"Really Whigga?" - Black Fella
"Tf you said? Do you even know what my people went through? I will shoot your Nigga ass, never call me Whigga"