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A foot pound is the amount of force required to move a pound of material one foot. By adding a surface area it becomes a measure of pressure.

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A foot pound is the amount of energy used when applying one pound of force over the distance of one foot (specifically, with the direction of the force being the same as the direction of movement).

So, if you use one pound of force to move an object one foot, you have used one foot pound of energy (or about 1.355 Joules).

Pounds per surface area is pressure. Foot pounds per surface area is something else.

Any amount of material can be moved any distance with an infinitesimal amount of force, given enough time... or maybe I'm missing something.

Not quite; friction has it's say first :)

It's the amount of energy required to lift one pound vertically by one foot, or the amount of momentum a one pound object gains by falling one foot in a vacuum.

Much of the confusion here comes from the fact that a pound is used both as a unit of force and as a unit of mass.

This is one of the many reasons y'all should use SI.

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