no-good ass

noun2

1. •
   (slang, offensive) A contemptible or undesirable person, especially a contemptible or undesirable boyfriend.

   • He's a no-good ass!
2. •
   (offensive, figurative) The buttocks of a contemptible or undesirable person, especially a contemptible or undesirable boyfriend. (used metaphorically to refer to such a person.)

   • He won't show his no-good ass around here again.