スリップストリーム

noun

slipstream

Refers to the area of reduced air resistance behind a moving vehicle, used in racing and cycling contexts.

• レース中ちゅう、彼かれは前まえの車くるまのスリップストリームに入はいってスピードを上あげた。

  During the race, he got into the slipstream of the car ahead and increased his speed.