Oh come on you totally ignore everything else I said. The fact that it is a contraction of “you all” is clearly stated. You just can’t comprehend it.
OTOH...you lot is plural and was used as such; but then, your reading comprehension skills are not even at the minimal level.
Not only have I not ignored anything you somehow managed to post, I replied, refuted, and basted you at every turn; which you are far too blind to see, accept, and understand. Now run away, it's the only thing left for someone such as you to do.