Sleeping partner British noun phrase UK informal
A partner in a corporation who does not actively participate in its administration, especially one who contributes money.
He formally retired from my company in 2010 despite having been a sleeping partner for nearly 20 years.
My father was the sleeping partner behind many of these successful projects.
Every man will eventually find a suitable woman to be his romantic partner.
people often do irrational or foolish things when they are in love.
I and my boyfriend have decided to get married in the summer. I don't think that's wise, since we won't have enough money saved by then to set up house. But then, one cannot love and be wise.