ユルゲン・クロップ
The song "Haifisch" gained some media attention by a line that is directed at BVB football trainer Jürgen Klopp, as following (translated from German into English): "Jürgen Klopp in Birkenstock [shoes]. Funny, funny when I shut him up with my belt". Following that, BVB media spokesman Sascha Fligge reacted to this by following statement: "For Borussia Dortmund nothing is more important than football. And nothing less important than such non-issues".