The swimsuit Borat wears in the film "Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan" is called a mankini. A mankini is a thong swimsuit for men. It has straps over the shoulders and a single strip of fabric down the back.
The film "Borat" was co-written and produced by British comedian Sacha Baron Cohen, who also stars as Borat Sagdiyev, the leading male character. Borat is a TV personality from Kazakhstan who travels across the United States to film a documentary about American life. The film was controversial when it was released, and it was banned in several countries.