Serious answer:
'Dindo nuffins' is a phrase used, typically in a mocking fashion, to represent the concept of black family members (especially mothers) talking to media and trying to defend their loved ones. It's used in situations where young black men are involved in serious incidents, and typically portrays the mother as being ignorant of the seriousness of the event.
It's a phonetic mash of 'didn't do nothing', a double-negative (quite common in
African American Vernacular English) that means a lack of involvement with an event.
It's often used to portray blacks as being tribe-like in their defense of other black individuals. Where no matter what the individual actually did, they almost always defend them by claiming that they 'didn't do nothing'. Hence, to mock these types of situations, people say 'dindo nuffins'.