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what's eating you

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Also, what's bugging you. What is annoying or bothering you? For example, We've conceded just about every point, so what's eating you now? or You're in a terrible mood—what's bugging you? The first slangy term, dating from the late 1800s, presumably uses eat in the sense of “consume”; the colloquial variant, from about 1940, uses bug in the sense of “annoy.” Also see what's with.

QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
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Fill in the blank: I can’t figure out _____ gave me this gift.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

How to use what's eating you in a sentence

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