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View synonyms for on the sly
on the sly
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Idioms and Phrases
Furtively, secretly, as in She's always eating cookies on the sly . The adjective sly , which means “cunning” or “crafty,” is here used as a noun. [c. 1800]Advertisement
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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