Slipstream (noun)

1. The flow of air that moves along the surface of an object moving through air, such as an airplane or a car, and that can be used to reduce drag and increase speed.
2. The turbulent flow of air behind a moving object, such as a vehicle or an aircraft.

Origin:

From slip + stream.

Examples:

1. The cyclist rode in the slipstream behind the truck to reduce wind resistance.
2. The airplane used the slipstream to gain speed and altitude.
3. The slipstream made it difficult for the car to stay in its lane.
4. The slipstream can be used to gain an advantage in a race.
5. The slipstream is created by the interaction between the object and the air.