rum-dum

rumdum

1. slang A useless drunkard. Sometimes hyphenated. This part of town is filled with addicts and rumdums. That old rum-dum hasn't held down a job in over 10 years. He's been too busy roaming from bar to bar.
2. slang A very stupid, bumbling, incompetent person. Sometimes hyphenated. I can't believe they appointed that rumdum to run the company. This device is so simple that even rum-dum like me can use it.
Farlex Dictionary of Idioms.

rum-dum

verb
See rumdum
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • rumdum
  • dum
  • dums
  • sozzler
  • souse
  • rummy
  • dumb-dumb
  • dum-dum
  • bleeding edge
  • hit-and-miss