Nutty is a composition by Thelonious Monk, cast in a thirty-two-bar AABA form. The tune is typically performed in Bb major and features the angular melodic writing and idiosyncratic harmonic sensibility that define Monk's body of work. The melody has a playful, off-kilter quality suggested by the title, with unexpected rhythmic accents and intervallic leaps that give it a whimsical character even as the underlying harmony follows a logical if unconventional path. Like many Monk compositions, Nutty rewards close listening, revealing layers of wit and structural ingenuity beneath what initially sounds like deliberate musical eccentricity. The piece occupies a place among Monk's mid-career output and sits comfortably alongside related compositions such as Off Minor, Pannonica, and Reflections in his catalog. It has been recorded in multiple settings, from solo piano to small group formats, and has appeared in arrangements for various instrumental combinations including piano trio, tenor saxophone with rhythm section, and bass features. While not as universally performed as Round Midnight or Straight No Chaser, Nutty is a recognized part of the Monk repertoire and continues to appear in jazz performance contexts. Its availability in numerous published arrangements and lead sheets reflects its ongoing presence in the working vocabulary of jazz musicians who engage with Monk's distinctive compositional language.