Thorough, thoroughly.

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1800.  [Mr. Ross said:] “Sir, this is not to half measure—I like to do things by the lump—and this bill you will allow is up to the hub.” Those who are acquainted with the slang language of the American Caucuses will be able to explain what is meant by up to the hub. It is reported about town that among other great men Jonathan Dayton is up to the hub.The Aurora, Phila., May 23.

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1800.  When this Senator was told by another Senator that his bill was a very bold and alarming step, Mr. Ross very coolly replied, “Yes, it is up to the hub.”Id., Nov. 15.

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1806.  Using a coarse expression, Mr. McRea, in all things necessary to promote the views of the party, was “up to the hub.”The Balance, Jan. 14, p. 11.

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1831.  [They] talked of … being ‘up to the hub’ (nave) for General Jackson.—T. W. Higginson, ‘Old Hickory,’ Harper’s Mag. (1884), lxix. p. 277/1 (June). (N.E.D.)

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1847.  We ’spect you to be right co-chunk up to the hub on them thar questions.—Robb, ‘Streaks of Squatter Life,’ &c., p. 31 (Phila.).

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1852.  I’ve made up my mind not to vote for any man for President that won’t go for Kossuth, clear up to the hub, and stand ready to fight the Russian Bear, if he meddles with Hungary.—Seba Smith (‘Major Downing’), ‘My Thirty Years Out of the Senate,’ p. 361 (1860).

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1856.  ‘For my part,’ said Abijah, rather grimly, ‘if things were managed my way, I shouldn’t commune with nobody that didn’t believe in election, “up to the hub.”’—H. B. Stowe, ‘Dred,’ chap. xxiii.

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