腰際

腰 = 月 + 要 : Maud Younger (y) is teaching the moon (月) how to dance in front of the aorta (ao1). She tells him again and again that he absolutely has to (要) use his hips (腰) more, as it is very important (要).

际 = 示 + 阝 : Joan of Arc (ji) and the pope (阝) have an international (际) meeting in the space station's bathroom (Ø4). They decide on the border through the bathroom and mark their territories using standards (示).