天然呆 tiān rán dāi

DEFINITIONS

  1. (loanword from Japanese "tennen boke") space cadet
  2. muddleheaded

CHARACTERS

天 tiān
HSK 1
sky, heaven; god, celestial
然 rán
HSK 2
yes, certainly; pledge, promise
呆 dāi
HSK 5
dull; dull-minded, simple, stupid