In the buff

prep_phrase, slang

Definitions

Adjective
  1. 1
    (used informally) completely unclothed wordnet
Prep_phrase
  1. 1
    Nude. idiomatic, informal

    "She was in the buff on the beach."

Etymology

From buff (“bare skin”, literally “brownish yellow”), an allusion to the color of tanned light skin.

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