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1.
The term apostrophe catastrophe denotes incorrect use or non-use of the apostrophe (') in a sentence.
Examples of apostrophe catastrophes:

We sell carrot's, parsnip's and potatoe's.

Its going to rain.

Johns coat and Marias bag were left on the train.

He grabbed the cat and started playing with it's tail.
by Fearman March 31, 2008