Plural possesive form of y'all. Used when addressing a group of 3 or more. Not to be confused with all y'alls, the plural non possesive form.

Sometimes spelled as all ya'll's, depending on what state you are in.
Hey, all y'all's car alarms are going off!

by MichelleW July 31, 2006
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A phrase to tick off residents of the UK invented by The Cheat and made famous by Strong Bad.
This will be great just say "screw all y'all"
by lunar April 04, 2003
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