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pneumatic
The adjective 'pneumatic' means of or pertaining to air, gases, or wind; filled or inflated with air or gas.
As a female, she is particularly "pneumatic"- usually taken to mean that she has attractive breasts, but perhaps also meaning that she is especially exciting during intercourse
the distance the piston moves
preparation is needing to go to recovery and the action
Prep can be short for either preparatory (as in preparatory schools) or preparation (as in homework preparation).
It means it sucks
what do you mean
This means to get prepared for something happening. It might lead to nothing but it is better to have everything ready just in case.
To get ready for something in advance.
Planning, Preparation and Assessment
The disadvantage is that the mean deviation of a set of data is always zero and so does not provide any useful information.