plain brown wrapper

English

Noun

plain brown wrapper (plural plain brown wrappers)

1. An obscuring cover or wrapper, originally to allow postal delivery of sexually explicit periodicals.
2. (by extension) Any veil, disguise, or mask.
3. (by extension) An act of dissimulation, camouflage; a cover-up.
4. (CB radio, slang) An unmarked police car.

   Synonym: plain wrapper