pomentum 

A typo for momentum, or the product of mass and velocity of an object. In physics, this vector quantity is represented by the letter p for some reason, hence the tendency to make such a typo.

The reason it much harder to stop a train than it is to stop a car is due to the former's very high mass and velocity, giving it greater pomentum.

pomentum by JohnBlaze420 April 21, 2011

poomentum 

The feeling of having to poop due to the force of your poop trying to exit your bowels.

Damnit!! I held in my dump too long and now I lost all my poomentum.

poomentum by Dambay June 23, 2018