ズッコケ

ズッコケ, ずっこけzukkoke

noun · noun or verb acting prenominally

  1. not the norm
  2. foolish
  3. stupid

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences