It is where you cant stop talking and blurting out sayings from the SNL skit "The Barry Gibb Talk Show" which is a great parody of the brothers Barry and Robin Gibb of the Doobie Bros. (aka Jimmy Fallon and Justin Timberlake)
Blurting out "aaaagghhhh" and "Do you have anything to aaaad" in a shreiking voice likeBarry Gibb! Out of nowhere I pulled a Gibbisms in the bar when I talked to that chick!
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.