Speedo

Noun

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

Japanese Meaning

タイトフィットな水着 / 競泳水着やダイビングで着用される水着 / ブリーフまたはビキニスタイルの水着

He adjusted his Speedo before diving off the board.

飛び込み台から飛び込む前に、彼はタイトな競泳用水着を直した。

Sense（1）

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

You can tell the serious swimmers: they're the guys wearing the Speedos.

Sense（2）

(by restriction) A male swimsuit, very tight fitting and small, brief-style, and not a thong-type.

Speedos

（ plural ）