Wiktionary
n. 1 A small amount of salt. 2 (context figuratively English) Caution, doubt, consideration.
Usage examples of "pinch of salt".
A perfectly clean pot and apparatus, a tiny pinch of salt, run the beans, which could be purchased dried and preroasted, through a coarse grinding machine, bottled spring water, add the components to the right parts of the machine, and it prepared the soup perfectly every time.
But then, any High Seat worth a pinch of salt knew enough to offer respect to the First Maid.
Doshi explained, surreptitiously scattering a pinch of salt over certain items on the chart.
Vangerdahast reached into the component pockets inside his weathereloak and withdrew a pinch of salt and another of soot, then rubbed them between his fingers and uttered a quick little spell.
Going to the hearth, she knelt and removed the lid of the earthenware pot to see if any water was needed, or perhaps a pinch of salt.
I'd had my fill of fame in the past, of course, and was all for it, but I knew how to carry it off, modest and manly, not too bluff, and with a pinch of salt.