bunny backed
bunny backing: (verb) the art of mounting someone's back and penetrating, while thrusting vigorously like a bunny
my wife was vacuuming and i bunny backed her over the couch
bunny piggy back
Verb. When you catch a yawn from another and it starts a chain reaction. Can be between two or more people.
We were trying to decide if we should go to bed or watch a movie. She wanted to go to bed so she bunny piggy backed me.