No, it's other way around. Russian (Russish) language was based on Russian Church-Slavonic language, which is based on Old South-Slavonic language. Ru with many words borrowed from Ukrainian (Russian) language.

For example, Ukraine holds word record by number of folk songs, while I was able to found none of folk songs in Russian (Russish) language after years of searching. Folk songs exists in Russia Federation, but they are not in Russian (Russish) language. Cuban Cossack Choir - folk songs are in Ukrainian language, Ural Cossack Choir - Ukrainian, for example.