What does amish butter-churner mean?

amish butter-churner meaning in Urban Dictionary

whenever making love with a lady that is lactating, gather a glass of the woman breast milk. Put your woman on the back with her feet in the air and pour the breastmilk into her genital canal. Procede to FUCK her lower as if you're churning butter. If the milk curdles, wipe it on some toast and feed it towards lover.