Smyslovye Gallyutsinatsii is a Russian rock band which has won the Golden Gramophone award twice.
The name of the band may be translated as "meaningful hallucinations" or "semantic hallucinations." This is not a medical term; it was produced as a slip of the tongue and stuck. The band is also known under a much shorter name "Glyuki", a slang term, which means basically the same: glitches in your brain.