speedo

/S P IY1 D OW0/
noun
  1. 1

    A speedometer, particularly one in a race car or other automobile.

noun
  1. 1

    A tight-fitting swimsuit, especially commonly worn by competitive swimmers and divers. Usually implies a brief or bikini style swimsuit.

    โ€œYou can tell the serious swimmers: they're the guys wearing the Speedos.โ€

Source: https://en.wiktionary.org/wiki/speedo