all mouth and no trousers

/AO1 L M AW0 TH AH0 N D N OW0 T R AW0 Z ER0 Z/
adjective
  1. 1

    (British, idiomatic) Alternative form of all mouth and trousers. [(British, idiomatic) Superficial, engaging in empty, boastful talk, but not of real substance.]

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