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draw in one's horns

Idioms  

Example Sentences

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V. be modest &c. adj.; retire, reserve oneself; give way to; draw in one's horns &c.

From Project Gutenberg

To draw in one's horns; to retract an assertion   through fear: metaphor borrowed from a snail, who on the   apprehension of danger, draws in his horns, and retires to   his shell.

From Project Gutenberg