have no idea
phrase
1
: to not know or understand
I have no idea what you're talking about.
2
—used to reply to someone as an emphatic "yes"
"Was it hard?" "You have no idea (how hard it was)!"
Cite this Entry
“Have no idea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/have%20no%20idea. Accessed 13 Aug. 2026.
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