anal propulsion 

The energy created when 2 or more people engage in anal sex. This method of energy production is not known to most of the known world and possess the power to propel a small car or propel a large space craft!

I used the power of anal propulsion to get to school in 3 minutes today!

or

Anal propulsion saved my life...and czechlosovakia

anal propulsion by Equipment of the magic dildos April 2, 2007

Lightning Propulsion Rocket Engine 

Lightning Propulsion Rocket Engine: This is a theoritical rocket engine that is based on the principles of cause an effect. Artificial lightning is discharged towards an ionized gas. When the lightning strikes the gas, it propels the craft forward at near the speed of light. The engine is designed to be used in the vacuum of space under zero gravity.
The engine was first theorized by a Christian science fiction writer named Victor Darnell Hadnot in one of his short stories.

Lightning Propulsion Rocket Engine: is used to propel a spacecraft near the speed of light. The engine that is used to move a spacecraft at the speed of light. Any rocket engine that makes use of artificial lightning to propel a spacecraft near the speed of light.

Lightning Propulsion Rocket Engine by Dr. Patricia Pystrum January 10, 2010

propulsion 

The action of driving or pushing further.

"They dive and use their wings for propulsion underwater."

propulsion by Diariaah September 30, 2020

Homo Sapien Propulsifier

A grav lift, or a device used to propel a human or small vehicle, or Grif, across large distances on open maps.

The newest invention of the Bungie Labs, the Homo Sapien Propulsifier, or grav lift, is perfect for propelling humans across the map in the event of a co-ordinated attack.

Homo Sapien Propulsifier by Idlewheelman February 4, 2010

Procursive 

When Asian people eat cats and fuck each other in the ass hole

Wow! that Procursive sure is a slug!
Procursive really likes it up the cocka doodle doo!

Procursive by masyem April 28, 2019

Vagina Propulsion System 

Female legs

Dude, check out that chicks VPS!
VPS?
Vagina Propulsion System. Leads to the glory land!

Vagina Propulsion System by Iben Wakenoff July 15, 2016

Jet Propulsion 

(V) The act of farting while walking; preferably used when a slow-moving, very lovable, senior citizen is on the move. (Jet propelling)

(N) The gas that is passed when a senior citizen is moving very slowly.

(Noun) Big Yiayia is jet propelling across the formal dining room. You know the one with the plastic on the couches?

(Verb) What was that sound? That was Big Yiayia's jet propulsion.

Jet Propulsion by greek_goddess2013 May 24, 2012