When you haven't washed your hands since you last had a wank and have now found yourself shaking hands with somebody important.
Dave shook hands with his girlfriends father. He remembered how he hadn't washed his hands since having a wank and awkwardly made eye contact with him. It was a Wankshake!
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.