Petrushka chord. Two major chords played a half-tone apart. So, it sounds good, except it sounds grating. It’s a motif throughout Stravinsky’s ballet Petrouchka. Ergo, like everything Stravinsky, get in my ears! Listen to it and learn more about the chord from the awesome “Feynman of classical music” (I just made that up) Leonard Bernstein.
Get in my ears, you dissonant chord