PULL DOWN YOUR VEST, verb. phr. (American).—A street catch-phrase of no special meaning.

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  1875–6.  H. G. RICHMOND, Burton’s Events [BARTLETT].

        But the latest flash saying with which we are blest
Is to tell a man quietly, ‘PULL DOWN YOUR VEST.’

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  TO LOSE ONE’S VEST, verb. phr. (common).—To get angry, lose one’s temper: cf.KEEP YOUR HAIR ON!’

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