noun
wife older than her husband
Colloquial term for a marriage where the wife is older; often carries a slightly old-fashioned or folksy feel.
See also: 姉さん (あねさん)
うちは姉さん女房で、妻が三つ年上です。
We have a wife-older marriage; my wife is three years older than me.
姉さん女房のほうが長続きするという話もある。
They say marriages where the wife is older tend to last longer.