Meanings
- CanadaUSidiomaticinformaluncountableA state in which a new mother is forgetful, absent-minded, or easily distracted.
Together, this leads a new mom to have “mommy brain” where she's happy but easily distracted and unfocussed.
2010, Maryanne Fisher, Victoria Costello, The Complete Idiot's Guide to the Chemistry Of Love, Alpha, →ISBN2 more examples
Whatever method of warming you use, always shake the bottle well and check the temperature every time before serving by shaking a few drops onto your wrist—you may have performed the same ritual a hundred times, but "mommy brain" can strike and cause you to make a mistake at any time.
2010, Erica Wells, Lorraine Regel, The Survival Guide for Rookie Moms: Things You Need to Know (That No One Ever Tells You), Wiley, →ISBNMommy brain can cause you to do things like forget parts of the English language and being forced to watch your vocabulary dwindle, telling the same stories week after week like it's still news […] and lose your car keys twenty three times a day.
2011, Karen Savage, Instructions Not Included: The Adventures of New Motherhood, AuthorHouse, →ISBN, page 71Synonyms: baby brain, momnesia
Synonyms & antonyms
nounA state in which a new mother is forgetful, absent-minded, or easily distracted.
Cite this entry
mommy brain. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/mommy%20brain
“mommy brain.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/mommy%20brain. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “mommy brain,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/mommy%20brain.
Source: mommy brain on Wiktionary, CC BY-SA 4.0.