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to the teeth

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1

Completely, fully, as in Obviously new to skiing, they were equipped to the teeth with the latest gear. This idiom dates from the late 1300s. Also see armed to the teeth; fed to the gills.

2

Also, up to the or one's teeth. Fully committed, as in We're in this collaboration up to our teeth. [First half of 1900s] Both of these hyperbolic usages allude to being fully covered or immersed in something up to one's teeth.

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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.

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