Definitions
pfuko: commonly refers to an earthenware pot used for storing liquids (except milk), though some dialect groups also use the word to refer to a pot for preparing relish and side dishes.
tonha: to dip a morsel of sadza into relish
Translation
An old woman’s relish pot is refused only after tasting from it.
Application
Do not reject something before giving it a fair try. It is wise to test things for yourself rather than dismiss them outright, especially when they come with the experience and insight of elders.