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http://en.wikipedia.org/wiki/Y%27all

Both are correct. I guess it depends on where in the South you live. I had a Texan friend explain all the "y'all" to me once.

And this one that backs up...

I thought "y'all" was singular and "all y'all" was plural?

That's exactly what it's supposed to convey. :p

I remember bugging my teenaged daughters a few years back that I was going to shorten whatever to 'tev and start a new thing. I kept using it...

Both are correct according to Wiki.

http://en.wiktionary.org/wiki/could_care_less

I could care less
I couldn't care less

Oops. guilty here. Will stop immediately! :o

libary

relator

school administrators who use the word 'piece' more than 10 times at a meeting

impact (as a verb)

I'll keep thinking, there are many.