stuck to butt
A character or object that is adhered to the surface of another's buttock(s). This is commonly shown as the result of a character or multiple characters being crushed under the butt of a large or heavy character, a character stuck to a butt might be cartoonishly flattened and "smeared" across the surface of the butt. In other cases, the stuck character is held in place by suction, glue, sweat or some other force.
In macro and micro images, tiny characters who are butt crushed and stuck to the butt may be implied to be killed or seriously injured, with the larger character's butt covered in (relatively) small blood spots.