Speedo

From Tardis Wiki, the free Doctor Who reference

Speedos were an article of clothing worn on Earth and other several planets.

Graham O'Brien wore them to Tranquility Spa under his clothing. (TV: Orphan 55)

In 2593 Emile Mars-Smith spent 20 minutes watching Tameka Vito's boyfriend, a Jeillo sunbake wearing a speedo at St Oscar's University. (PROSE: Beyond the Sun)