Dhinka chika definitely doesn't have a meaning. Not in Hindi at least. Though, it sounds close to a commonly used, I'd say local word, dhinchak. Dhinchak is generally used for something very good, interesting, superb etc. It seems Dhinka chika is a ringa ringa version of Dhinchak only. Either way, it's made to be danced upon. So dance up. Dhinka chika!