Then exhale and twist your torso to the right, keeping the left buttock on or very close to the floor.

呼气扭转你的躯干向右，保持左臀在地板上或者很离面很近。

youdao

Tuck your left hand under your right knee and bring your right hand to the floor just beside your right buttock.

左手放在右膝上并且右手在右臀向地板的方向。

youdao

Susanne scratched her left buttock.

NEWYORKER: The Yellow

Despite a weight disadvantage, he hiped Whitfield for the first fall, went down to an outside hipe for the second and then won the third and deciding fall by going to buttock but changing direction suddenly with a cross-click which left Whitfield without a leg to stand on.

BBC: Cumberland wrestling round-up