whathappenedtonight
Parents always used ‘sore tummies’ for diarrhoea and/or constipation .
My MiL had kindly looked after DD for a day and, when I came to fetch her, discreetly told me that "her nappies were a little loose".
Initially thought she hadn't been pulling the tapes across securely enough 
As for "yummy", I'd take that every time against a former friend's versions of: "I luffs my , I do!", followed by a good old visible massage of her lips with her tongue and a huge "Slurrrp!" noise.
I hate the 😋 emoji because it reminds me of that.