Jerome Boeteng

German soccer superstar Jerome Boateng is on a mission to be the most iced out player in the game ... going on a $350k watch and chain jewelry spree!!! TMZ Sports has learned ... the 30-year-old Bayern Munich defender wanted to treat himself with some shiny new gifts ... hitting up Gabriel the…

Now that Germany's out of the World Cup, star defender Jerome Boateng has touched down in Los Angeles to enjoy some time off ... where he's contemplating his professional future. There are rumblings that the 29-year-old Bayern Munich star could retire from the German national team to make space…