The fusion of the words what and ever, the lazyman's whatever.
Usually used on it's own as a response to something you care not for and do not want to discuss.
Ma: "Andrew, I've discovered you've been shagging the dog behind our back. That dog means a lot to your father and you should respect his wishes, I'm sick to death of..."
Andrew: *groans* "whevah..."
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.