not have the faintest/slightest idea
phrase
: to not know or understand at all
I don't have the faintest/slightest idea what you're talking about.
Cite this Entry
“Not have the faintest/slightest idea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/not%20have%20the%20faintest%2Fslightest%20idea. Accessed 12 Mar. 2026.
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Merriam-Webster unabridged
