subs. (common).—A mythical corps, very commonly cited in jokes and quizzies on the innocent. [THE JOLLIES (q.v.) or Royal Marines, being ignorant of seamanship, have always been the butt of bluejackets.] TELL THAT TO THE MARINES (or HORSE-MARINES) THE SAILORS WON’T BELIEVE IT = a rejoinder to an attempt at imposition or credulity. Often amplified with WHEN THEY’RE RIDING AT ANCHOR. See also BINGHAM’S DANDIES.

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  1824.  SCOTT, St. Ronan’s Well, ch. xxi. ‘Come, none of your quizzing, my old buck,’ said Sir Bingo—‘what the devil has a ship to do with horse’s furniture?—Do you think we belong to the HORSE-MARINES?’

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  c. 1870.  Broadside Ballad, ‘Captain Jinks.’ I’m Captain Jinks of the HORSE-MARINES.

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  1886.  STEPHENS and YARDLEY, Little Jack Sheppard, p. 3.

        They may tell that yarn to the HORSE MARINES
  For we bean’t such fools as we looks.

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  1886.  Tinsley’s Magazine, April, 321. Owing to a singular deviation from the ordinary functions of cavalry, the 17th Lancers were once christened the HORSE MARINES.

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  1892.  Wops the Waif [Horner’s Penny Stories], ch. i., p. 1. Oh, nothink, eh! You’d better tell that to the HOSS MARINES; I’ve lived a sight too long in Shoreditch to take that in.

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