slip one over on
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slip one over on (one)
To con, deceive or take advantage of one; to make a fool of or hoodwink one. My little brother always thinks he can slip one over on me, but I'll be the one to get the last laugh next time! Beware of these street vendors selling tacky souvenirs. They're usually just trying to slip one over on you.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
slip one over onInformal
To hoodwink; trick.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.