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A rude invective expressing disdain, contempt, disgust, or anger to someone. I've taken enough of the boss's crap—tell him he can stuff it, because I quit! Stuff it, Bill! You don't know what's best for me!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Take back something, as in As for that memo of yours, you can just stuff it. This idiom is used, often as an interjection, to express contempt or defiance. Presumably it is short for "Stuff it up your ass." [ Vulgar slang; 1950s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
stuff itVulgar Slang
Used as an intensive to express extreme anger, frustration, or disgust.
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.