This document summarizes two Russian idioms - "не ударить в грязь лицом", which means "not to throw mud in one's face", and its English equivalent "egg on your face". It provides the meanings of the idioms as not doing anything to hurt oneself or one's reputation. It also cites the sources of the idiom definitions.

1. Russian Idiom Project By Nate Spicuzza and Noah Gross

2. Russian Idiom не ударить в грязь лицом &quot;Godzilla Speaks Archives.&quot; PlaneBuzz . Web. 16 Sept. 2011. <http://www.planebuzz.com/godzilla_speaks/>.

3. Not to throw mud in one’s face. &quot; Godzilla Speaks Archives.&quot; PlaneBuzz . Web. 16 Sept. 2011. <http://www.planebuzz.com/godzilla_speaks/>.

4. Egg on your face. &quot;Stock Photograph of Egg On His Face Bxp27209 - Search Stock Photography, Photos, Posters, Images, and Photo Clip Art - Bxp27209.jpg.&quot; Stock Photography - Search 9.6 Million Stock Photos, Stock Footage Video Clips, Royalty Free Images, and Illustrations . Web. 19 Sept. 2011. <http://www.fotosearch.com/BDX119/bxp27209/>. Stock Photograph - egg on his face.
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5. Meaning Not to throw mud in one's face means not to do anything to hurt yourself or your reputation.