1Relating to or suitable for a mother and her child.
2Designating or relating to organized groups, activities, events, etc., designed for both a mother (or other person responsible for childcare) and infant to participate in or attend.
In earliest use with reference to young children rather than babies.
1A mother and her baby or young child.
2An organized mother and infant group, activity, event, etc.
1940s; earliest use found in The Salt Lake Tribune. From mommy + and + me.