Used to retort against the insult of "Your mother", better known as "Yo mama". Like "Yo mama", it's most often used when you can't think of anything better to say. However, you can also use the term to describe a person.
Person 1: Yo mama!
Person 2: Yo, shut yo face, you stupid cracka! Yo mama's White Puddin'!
Person 1: Geez, have you seen Mandy today?
Person 2: Oh yeah, she looks like such a White Puddin'!