天花板

tiānhuābǎn
  1. ceiling (of a room)
  2. (fig.) upper limit; (slang) the very best (in a given field)

CEDICT

slang

Entry Composition

1 天花 tiānhuā
  1. smallpox
  2. ceiling
  3. stamen of corn
  4. (old) snow
  5. (dialect) sesame oil
=2 板 bǎn
  1. board
  2. plank
  3. plate
  4. shutter
  5. table tennis bat
  6. clappers (music)
  7. accented beat in Chinese music
  8. hard
  9. stiff
  10. to stop smiling or look serious

classifier: 塊
=2 板 bǎn see 老板, boss