The pose that all sorority girls, everywhere, at every college, immediately get into when taking a group picture. It consists of a hands-on-knees squat of varying heights, usually with a few short girls sitting in the front. This creates an easy, organized, tiered pose (because, God forbid anyone be covered in the picture).
Look at those cute A-Chi-Os! Someone pulled out a camera to take a Bid Day picture and even the pledges knew without instruction to crouch into Sorority Pose.