The phrase 'no hay güiro' is not a universally recognized Spanish slang term, it seems to be a regionalism or a phrase with a very specific cultural context. So, it's hard to provide a definitive meaning without knowing where or how it was used. It could possibly refer to a musical instrument called 'güiro' or it could be a misspelling or mispronunciation of another phrase. More context would be needed to provide an accurate translation or meaning.