Robbie Williams "Imam veliki kurac" (Zagreb 2013)
Filmed on 13th August 2013 at Stadion Maksimir in Zagreb, Croatia.
He said "Ja imam veliki kurac", but I accidentally cut off "Ja" when I came home after the concert. The meaning is the same = I have a big cock (also in Slovene language), but it sounds a lot like "I'm a veliki kurac" (I'm a big cock).