鑽空子

钻空子
zuānkòngzi
to take advantage of a loophole; to exploit an advantage; to seize the opportunity (esp. to do sth bad)

CEDICT

Entry Composition

1 鑽 zuān
  1. to drill
  2. to bore
  3. to get into
  4. to make one's way into
  5. to enter (a hole)
  6. to thread one's way through
  7. to study intensively
  8. to dig into
  9. to curry favor for personal gain
2 空子 kòngzi
  1. gap
  2. unoccupied space or time
  3. fig. gap
  4. loophole