Meaning of “add salt to sth” in the English Dictionary

british dictionary

"add salt to sth" in British English

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add salt to sth

UK old-fashioned

If you add salt to a subject or conversation, you make it more interesting:

You can be sure she'll always add salt to the conversation!

(Definition of “add salt to sth” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)