* It's a misspelling: Could you be thinking of a similar-sounding phrase? Knowing the context (where you heard/saw it) would help.
* It's a name or slang: It might be a nickname, a made-up word, or slang specific to a certain group or region.
* It's from a specific language or dialect: If it's from a less common language, more information is needed to translate it.
Please provide more information so I can help you understand what "Das Hiko" means.