三坏先森三好菇凉
[sān huài xiān sēn sān hăo gū liáng]
A playfully whimsical and slightly ironic way to describe a pairing between two individuals: a not-so-perfect (three flaws) boy/man paired with a perfectly sweet (three goods) girl/woman, hinting both imperfection and charm, and the balance of personalities complementing each other well despite or because of their contrasts.