A male usually over the age of 25, who is a jobless loser that lives at home. They tend to prey on barely legal little girls. The girls have no benefit for being a Sour Baby.

i.e. the opposite of a Sugar Daddy
Jack Smith was fired from his job at the gym, lives at home, is dating a young girl named Chloe, and is known by friends as a Sour Daddy.
by Palissa Almer October 19, 2011
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