1.
Widely adaptable large unit of measure. Generally speaking, take an amount of something that an average person may have and add a shitload more to it. This results in a shit-ton.
Kilby has a shit-ton of old NES games.

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2.
a lot
I have a shit ton of beers in my fridge.

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3.
An ambibously large number, larger than a crapton, but less than a holyfuckton
Well the original had 29,000 transistors, and the P4 has about 55 million... so to sum it up... a shitton

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4.
A Shit-ton is equivalent to 24 metric assloads, or 1/10th of a fuck-ton.

Used to measure un-quantifiable amounts of something. Although it can be used in the measurement of very large people it actually is not a unit of weight.

That guy must weigh a shit-ton.

Good Usage:
I just payed a shit-ton more money switching to Geico AND it took 20 minutes.
-or-
A shit-ton of thought went into this definition.

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5.
Defined literally as 20 hundredshits, where one hundredshit equals 112 shits in the Imperial System (long or gross hundredshit) and 100 shits in the U.S. System (short or net hundredshit). Furthermore, a shit-ton-force refers to 2,000 shit forces, which is a hell of a lot (i.e. a shit-ton) of Newtons.
"We just received a shit-ton of corned beef from Europe."

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6.
1. A large quantity
2. A quantity beyond measure
That is a shit-ton of homework.

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7.
Not just a large amount of something, but a gregarious amount of something you don't want. Similar, at least in idea, to too much.

One can't have a shit ton of money. One can, however, have a shit ton of ants in ones pants, or a shit ton of holes in a bag of money.
Upon entering my kitchen I noticed there were a shit ton of ants everywhere.

After taking my final exam, my friend and I concurred that there was a shit ton of material we did not know.

It takes a shit ton of gas to drive from California to New York and back.

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