Adjective meaning sub-standard/poor/rubbish. Most commonly used when describing something which has been ill conceived or is of bad taste.
Despite "russia" being in the word, this has no relevance and does not imply a link with the country. The word actually derives from the Anglo-Saxon derogitory term "Hegbow-ruse". Hellorussia replaced this discontinued term when Modern English revolutionised our language.
That said, "hellorussia" is a rarely heard and colloquial adjective which does not appear in the dictionary.
When used after the subject:
"His band is very hellorussia."
When used before the subject:
"What a hellorussia bassist."