In AmE, "Mommy and me" refers to any type of activity or "play group" that involves both mother and child (usually the child is an infant or a toddler). For example, if the local YMCA pool states that every Monday from 8AM to 9AM is "Mommy and Me Swim", that means that the pool will be populated with mothers and children. A "Mommy and Me" exercise class is one that involves mothers participating in aerobic exercises like "
power walking" while pushing a
stroller. There are also specialty "mommy and me" retail shops that sell both maternity clothes and infant wear, but it is not a trademark or
chain.