A defensive maneuver employed in beer pong where the team that does not have the ball pelvic thrusts the air behind their cups in an attempt to disrupt the concentration of the team throwing the ball.
We were getting destroyed in beer pong, but we managed to turn it around when we deployed thrust defense.

It's time for some thrust defense!

Their thrust defense really messed me up, I couldn't concentrate with all that air humping going on.
by Chern E January 23, 2010
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