A person that does not require any external verbal berating from others, mostly because they do a good enough job of being a complete mockery of themselves.
"Yo, that dude in the sparkly skinny jeans and Ugg boots up on stage trying to act hard is a total goofnugget"
1) a silly goose; usually somewhat of an oddball
2) a funny person; not an offensive term. meant to be said lovingly
"Joanna, you are such a cute little goofnugget!"
"Luke's such a goofnugget. He always makes me laugh.