too smart by half
To be "too smart by half" (also common is "
too clever by half") is to be too smart for one's own good, meant either literally or ironically. As an idiom, it is usually sarcastic. The phrase has a wide range of potential uses; for instance, it can mean:1.) Something so complex that it's self-obfuscating.2.) A seemingly clever action that is in fact foolish.3.) Logically accepting something as necessary that isn't.4.) Overanalysis.5.)
Elitism (see
ivory tower).