The opposite of "wiggerly". "Wiggerly" means to act like a wigger. A wigger is a white person who acts like a black person. Therefore, "unwiggerly" means "a white person not acting like a black person". This term was first coined by singer-songwriter Andrew Lee as the title of his debut album, where he encouraged youths to be original and not follow the crowds of the trendy wiggers.
"Dude, quit wearing all those gangsta clothes and just be yourself! Be unwiggerly!"
It was very unwiggerly of him to go to a country music festival.