A sex position usually used in orgys. It involves a man or woman (with a strap on dildo) to insert their penis/dildo up the anus of the person in front of them, the person with a penis/dildo in them will proceed to insert their penis into the person in front of them. This will repeat until it forms a line.
A Magic School Bus is a tiny insignificant penis smaller even than a micro penis.
It's so small that any penetration goes unnoticed by the receiver...much like the MSB itself.
When a woman consumes the man's family jewels (aka the testicles) and puts them in her mouth and down her esophagus and into her lower intestine until the testicles can be visibly seen protruding from her rectum.
During Sunday School, Bridget had a sudden craving for dumplings. Her needs were promptly satisfied when Gary performed The Magic Jewel Bus.