no flies on
idiom
chiefly British, informal
—used to describe someone as quick to understand things and not easily fooled
That chap is brilliant—there are no flies on him.
Cite this Entry
“No flies on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/no%20flies%20on. Accessed 11 Jul. 2025.
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