шаромыга

Etymology
From the adverbs ша́ром (šarom), ши́ром (širom), шу́ром (šurom) ‘free of charge’ (from hucksters' slang), plus the suffix. The popular version deriving the word from, a term used by soldiers of the retreating army of Napoleon to appeal for help, mercy, etc. nowadays is considered wrong.

Noun

 * 1)  crook, swindler, fraud