年寄りの冷や水 (としよりのひやみず) Japanese meaning | KotomoraMeanings
1
expression, noun
an old person's reckless act; old people doing dangerous things
idiomatic expression
An idiomatic admonishment used when an elderly person does something risky or inappropriate for their age, often implying they should know better.
When my grandfather tried to go outside lightly dressed in midwinter, I warned him, 'That's an old person's reckless act.'