名不符實

名不符实
míngbùfúshí
the name does not correspond to reality (idiom); it doesn't live up to its reputation

CEDICT

synonym of 名不副實 /名不副实 (míngbùfùshí, “the name falls short of the reality; to be unworthy of the name”)

Wiktionary

空有虛名，不當實際。如：「如果叫『冷氣公車』，行駛時卻又不開冷氣，豈非名不符實？」也作「名不副實」、「名不當實」。

重編國語辭典

Entry Composition

1 名 míng
  1. name
  2. noun (part of speech)
  3. place (e.g. among winners)
  4. famous
  5. classifier for people
2 不符 bùfú
  1. inconsistent
  2. not in agreement with
  3. not agree or tally with
  4. not conform to
3 實 shí
  1. real
  2. true
  3. honest
  4. really
  5. solid
  6. fruit
  7. seed
  8. definitely