Soil (one's) nappy spoken language verb phrase
The phrase is mostly heard in the UK.
To poo into the diaper.
I think Dan just soiled his nappy. We gotta change it.
My grandpa is 90. He’s gaga and sometimes soils his nappy.
You should bring extra diapers in case the baby can soil his nappy during the trip.
I hope when I get old, I won't be a gaga woman soiling my nappy.
(Of a woman) To use the toilet; used as a polite excuse for wanting to do so.
To poop.
To take a pee or (less commonly) defecate.
To poo.