The morning name from two days ago, a bit of language play, with the repeated pattern
r … gr … t r … gr … t
apparently invented in my sleeping head rather than remembered from previous experience. The whole thing is a N + N compound, and as such, is capable of a range of interpretations — primarily in two broad classes: with an object interpretation of rugrats, ‘regrets about / over rugrats’, on various accounts; and with a subject interpretation of rugrats, ‘regrets of / by rugrats’, also on various accounts.
Then there’s the first element of the compound, itself a N + N compound, composed of rug + rat literally ‘rat located on, inhabiting a rug”, but with rat understood metaphorically (referring to small children as rat-like creatures) and rug understood metonymically (referring to household play surfaces more generally). The result is a colorful way of referring to toddlers, with the verminous connotations of rat apparently bleached out by playfulness.