leg cropped sex
A variant of offscreen sex, where only the characters' legs are shown. One set of legs is usually off the ground, with cum dripping from them.
This is often standing sex or against surface sex, and the posing may imply that the penetrated partner is suspended by penis.
Despite "cropped" in the name, this tends to apply to scenes that are framed this way, not scenes that are actually cropped edits of a larger image.