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gut it out

Also, tough it out. Show pluck and perseverance in the face of opposition or adversity. For example, I know it's hard but we'll just have to gut it out, or His boss has a terrible temper, but Joe is determined to tough it out. The first term dates from the mid-1900s; the variant was first recorded in 1860.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.