When she was an infant, I had overactive letdown and overabundant supply issues, and those two things combined made those early weeks and months a big, milky mess. (sortacrunchy.net)
I would say: «90 % of my moms» have way great milk supply just overabundant milk supply where they had so much milk.» (pregnancymagazine.com)
Many times moms with overabundant milk supplies also experience forceful letdowns. (motherandchildhealth.com)