(名詞) 與嬰兒同床俾方便哺乳 (breastfeeding) 的作法。這個字是由 breastfeeding + co-sleeping 拼綴而成。
breastsleep (動詞)

In a peer-reviewed report published in Acta Paediatrica, McKenna argues that we should return to “breastsleeping,” the act of combining breastfeeding with infant sleep, a co-sleeping model that mothers around the world have been practicing for thousands of years.
—Erin Schumaker, “Why One Researcher Thinks Mothers And Infants Should Share Beds,” Healthy Living Editor, The Huffington Post, October 6, 2015

Babies need to be nursed both day and night. Mothers and babies need sleep. Ergo, breastsleeping.
—“Breastsleeping — New word, Old concept,” DONA International, October 7, 2015