jmujacych
Jmujacych is not a standard, widely recognized term in Polish. In proper Polish orthography, the non-diacritic string "jmujacych" would normally be written with diacritics as "jmujących," which is the genitive plural form of the present participle "jmujący" derived from the archaic verb "jąć" meaning to seize or take. The participle "jmujący" is used to describe those who seize or capture, and "jmujących" would appear in a sentence as part of a larger clause or phrase.
The non-diacritic variant often arises in texts where diacritics are stripped, such as older printings, plain-text
If encountered in running text without diacritics, it is usually prudent to check the surrounding words to
In summary, "jmujacych" should be understood as a nonstandard orthographic variant of a standard Polish participial