Plow pose

A plow pose (まんぐり返し Mangurigaeshi) is a type of position where a character is lying down on the back and folds their legs to their upper body region. It's a pose that puts much emphasis into the crotch region, which makes it erotic. On pixiv, it usually depicts a female character performing the pose and in a sexualized way.

The name itself is a portmanteau of "pussy" (まんこ manko) and "somersault roll" (でんぐり返し Dengurigaeshi) — Minus the 'rolling' part. It may be an erotic slang in Japanese in a sexual topic.

In regards, the pose is generally used as a sexual connotation in many works. They often feature characters engaging in cunnilingus on the lying partner. In other instances, there are also slightly tame works of visualizing the pose itself; featuring plenty of illustrations of female solo pin-up on pixiv.