mainly British lower class expression used in an extremely angry tone of voice. Is said in retort to something which the speaker did not like. The best response is a calm "you heard".
You've have just had some great news.. ie a bet has come in or an all clear test result from the clap clinic. Perfect for beginning to tell your friends about some good news you've just had. You must emphasise the second "what", building up to it creshendo style.
"You what youuu what, that curry paste did come out with soap and water"
chiefly southern, esp texan. added at the end of pretty much anything, esp to add exclamatory sense to a clause. has a somewhat cryptic meaning known only to southerners. so you non-hicks, stop trying.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.
We have a Zoom meeting in a few minutes and I’ll probably go pajama casual.