From the dairy farming world: “bagging out” means “to begin lactation.” So, when your friend has a baby, ask her “You baggin’ out good?” to indicate your support for and interest in the healthy practice of breast-feeding.
From cycling and other sports, the “dick spot” is the best ranking that doesn’t win a prize– fourth, I guess. See this Slate article on doping, and the word dicksizing.
Secretly Ironic 