what's eating you
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.
Words nearby what's eating you
what'd,
what'll,
what's,
what's cooking,
what's done is done,
what's eating you,
what's good for the country is good for general motors, and vice versa,
what's good for the goose is good for the gander,
what's in a name? that which we call a rose / by any other name would smell as sweet,
what's it to you,
what's new