笨蛋

bèndàn
  1. (mild insult) fool; idiot
  2. (playful) silly person

CEDICT

Entry Composition

1 笨 bèn
  1. stupid
  2. foolish
  3. silly
  4. slow-witted
  5. clumsy
2 蛋 dàn
  1. egg
  2. oval-shaped thing

classifiers: 個, 打