Beware! Y’all doesn’t necessarily include everyone:
> All y'all is used in the Southern United States when a speaker wishes to include everyone being addressed. Y'all may refer to an indefinite set of members of a group, but all y'all definitively includes everyone in the group.
I dunno, as someone who’s lived their entire life in the southern US this sounds really pedantic. At best.
Also, is it just me or does that Wikipedia entry have zero citations? I thought Wikipedia was allergic to citation-free claims..