A fictional insult constructed by the copy editors for the US edition of the Hitchikers Guide to The Galaxy series of books to replace the word asshole which was considered too offensive for the US readership.
A modern example of bowdlerization.
Original Sentence (UK edition of "Life, the Universe and Everything")
"You're a jerk, Dent... A complete asshole." - Wowbagger
Bowdlerized Version (US edition of "Life, the Universe and Everything")
"You're a jerk, Dent... A complete kneebiter." - Wowbagger
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.