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Fifty-four-forty or Fight

[fif-tee-fawr-fawr-tee, -fohr-]
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U.S. History.
  1. a slogan popular in 1846, especially among Democrats, who asserted U.S. ownership of the entire Oregon country, including the part that Great Britain claimed between 49° and 54° 40prime; N latitude.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018