Definition of johndarm in US English:

johndarm

(also Johndarm, john-darme)

noun

slang, historical
  • A police officer.

Origin

Mid 19th century; earliest use found in Theatrical Journal. From gendarme or its etymon French gendarme, with (probably humorous) substitution of the male personal name John for the first element.

Pronunciation

johndarm

/ˈdʒɒndɑːm/