Uncle nab(s)

Uncle nab(s)

dated slang A policeman, or the police in general. Round these parts, people tend to be as scared of Uncle nabs as they are of criminals. I thought someone was going to get killed until Uncle nab showed up and broke the fight up.
See also: uncle
Farlex Dictionary of Idioms.

Uncle nab

n. a policeman. Watch out for Uncle nab. He’s been asking about you.
See also: nab, uncle
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • Uncle nab
  • scared stiff
  • scare (one) stiff
  • scare stiff
  • annoy
  • scare the hell out of (one)
  • scare, annoy, etc. the hell out of somebody
  • You scared the hell out of me
  • scare the devil out of (one)
  • scare out of one's wits