Question: is y'all a slang word?
Answer: Though "y'all" is inherently plural, in the instance of addressing a larger group of people, "all y'all" is more of a casual, slang phrase that's sometimes used. ... The only right way to spell the contraction of "you" and "all" is "y'all." "Ya'll" is incorrect and a misspelling of the word, so don't use it.