The act of one pregnant partner of a lesbian 69 who manipulates her lactating breasts in such a fashion as to make them disgorge their milky load into the vagina and rectum of the second partner.
"So i was totally scissoring with Sheila, then we switched to 69 and out of nowhere BOOM she gave me a righteous Milk Shocker" --Homework Chan
by Knowledgeispower July 11, 2008