More than a grain of salt; for verbal garbage that needs a little extra seasoning to make it palatable. Example: Joe: I've never known him to be a violent guy. Which is why I have to take these stories about his sudden rage explosions with a pound of Morton's iodized. Don: You're obviously not talking about Chris.
WITH A POUND OF MORTON'S IODIZ
Meaning of WITH A POUND OF MORTON'S IODIZ in English
Slang English vocab. Английский сленговый словарь. 2012