Brainable is someone who's so smart/sexy/funny you'd like to do them -- at least metaphysically, anyway, 'cause frankly they're so awesome that it would seem weird to actually do them, like, you know like having sex with Santa or Abraham Lincoln or something.
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.