lǎo​hǔ​pì​gu​mō​bu​de

not to be trifled with

  1. tiger
    tiger; a large, fierce carnivorous feline with yellowish-brown fur and black stripes
  2. buttocks
    buttocks; bottom; backside; the common term for the area around the anus of humans or animals
  3. verb
    to touch
    to touch or stroke with the hand; to feel; to grope for
  4. [potential]
    Used after a verb or adjective to express that something is impossible or not permitted.