I am starting to compile a list of words that people use in forums...words that don't exist or that are used incorrectly. I think it is sad that if such words are used enough they become a part of the language.
alot A lot in merchandising is a certain quantity of items offered for sale. People seem to use "alot" to mean a large quantity of something but it is not a word.
alls "alls I have to do today is..." I guess people mean "all that I have to do...".
your I know "your" is a good word, but it does not mean "you are".