you all
y'all
/jɔl/Linking
In real speech
What happens to the sounds
you all squeezes into one syllable: the vowel of you disappears and the words merge → /jɔl/.
When to use it
Typical of the US South, but now heard everywhere in conversation and on social media. Used to address a group, never one person.
Casual → formal
Slang
y'all
Neutral
you guys
Formal
all of you / everyone
Sound notes
Linking: words are said together, without a pause, as if they were one word.