body English

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Bodily movement in a usually unconscious attempt to influence the trajectory of a moving object, such as a ball.
• noun Body language.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun idiomatic A body motion made to coax an object already propelled go in a desired direction. For example, a nervous leaning or twisting movement while playing sports such as golf or bowling, to "persuade" the ball to go in a desired direction.