A slang term for a human female with enormous natural
breasts, bigger than tits, boobs or melons. So named because without a bra they hang to the girl's chest. Most common on lactating MILFs, however some younger women with macromastia/gigantomastia can also sport a pair of these. The easy way to tell is push them up when the girl is laying down - if they comfortably
fit under her chin or can cover her
face then you've got a pair of udders on your hands.