不对头

不對頭
bùduìtóu
  1. fishy
  2. not right
  3. amiss

CEDICT

不和睦、合不来。如：「你和他是几时开始不对头？」也作「不对劲」。

重編國語辭典

Entry Composition

1 不对 bùduì
  1. incorrect
  2. wrong
  3. amiss
  4. abnormal
  5. queer
=2 头 tóu
  1. head
  2. hair style
  3. the top
  4. end
  5. beginning or end
  6. a stub
  7. remnant
  8. chief
  9. boss
  10. side
  11. aspect
  12. first
  13. leading
  14. classifier for pigs or livestock

classifier: 個
=2 头 tou suffix for nouns

Related entries

腥 xīng fishy (smell)
不对劲 bùduìjìn
  1. not in good condition
  2. wrong
  3. fishy
不是味儿 bùshìwèir
  1. not the right flavor
  2. not quite right
  3. a bit off
  4. fishy
  5. queer
  6. amiss
  7. feel bad
  8. be upset
不对 bùduì
  1. incorrect
  2. wrong
  3. amiss
  4. abnormal
  5. queer
那不对，对吧？

That isn't true, is it?

Source: Tatoeba