hell-on-wheels

hell on wheels

Extremely difficult, unpleasant, or aggressive. That woman is hell on wheels when she's angry, so don't let her into my office. I can already tell that this client is going to be hell on wheels to work for.
See also: hell, on, wheel
Farlex Dictionary of Idioms.

hell-on-wheels

n. a very impressive person or thing; an extreme type of person or thing. (Use caution with hell.) This little machine is hell-on-wheels for general woodworking purposes.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • go from bad to worse
  • from bad to worse
  • like pulling teeth
  • come to a bad end
  • come to a bad/sticky end
  • learn (something) the hard way
  • learn the hard way
  • get (something) over with
  • get it over with
  • find (something) out the hard way