無事獻殷勤，非姦即盜

无事献殷勤，非奸即盗
wúshìxiànyīnqín,fēijiānjídào
one who is unaccountably solicitous is hiding evil intentions (idiom)

CEDICT

Entry Composition

1 無事 wúshì
  1. (literary, vernacular, dialectal) to have no further business; to have nothing further to discuss
  2. to have no further business; to have nothing further to discuss
2 獻殷勤 xiànyīnqín to be particularly attentive to (an attractive young lady or man etc); to fawn upon (an influential politician etc); to court sb's favor; to ingratiate oneself
3 非 fēi
  1. to not be; not
  2. wrong; incorrect
  3. non-; un-; in-; de-
  4. to reproach; to blame
  5. (coll.) to insist on; simply must
4 姦 jiān
  1. to fornicate
  2. to defile
  3. adultery
  4. rape
5 即 jí
  1. namely
  2. that is
  3. i.e.
  4. prompt
  5. at once
  6. at present
  7. even if
  8. prompted (by the occasion)
  9. to approach
  10. to come into contact
  11. to assume (office)
  12. to draw near
6 盜 dào
  1. to steal
  2. to rob
  3. to plunder
  4. thief
  5. bandit
  6. robber