side plank

Noun

 * 1)  A yoga pose in which the body is held rigidly straight, with weight resting on the feet and one arm, where the upper body is held off the ground by the upper arm, leaving the lower portion of the arm on the ground.
 * 2)  A plank on the side of something.
 * 1)  A plank on the side of something.
 * 1)  A plank on the side of something.
 * 1)  A plank on the side of something.