2011, Laura Marie Altom, A Baby in His Stocking, Harlequin (2011), ISBN 9780373753871, page 81:
Natalie said, "Esther's going to be none too pleased to find she's dining on formula this morning instead of her usual fare."
"Does that mean we're out of boob milk?" Kolt looked genuinely distraught.
2011, Lidia Yuknavitch, The Chronology of Water: A Memoir, Hawthorne Books (2011), ISBN 9780983304906, unnumbered page:
I used to watch Miles fall asleep from drinking boob milk late into the night.
2013, April Peveteaux, Gluten Is My Bitch: Rants, Recipes, and Ridiculousness for the Gluten-Free, Stewart, Tabori, & Chang (2013), ISBN 9781613124833, unnumbered page:
After all, you're the only one manufacturing that boob milk.