老虎头上打苍蝇
lǎo​hǔ​tóu​shang​dǎ​cāng​ying

extremely dangerous

  1. 老虎 lǎo​hǔ noun
    tiger
    tiger; a large, fierce carnivorous feline with yellowish-brown fur and black stripes
  2. 头上 頭上 tóu​shang locativenoun
    overhead
    overhead; on top of the head; the space above one's head
  3. 打 dǎ verb
    to hit
    to strike; to knock; to beat; to break
  4. 苍蝇 蒼蠅 cāng​ying noun
    fly
    housefly or any of various related two-winged insects