In the song "It Was A Good Day" by Ice Cube, there is this little beat that sounds like "koo-aw da hoo-haw." It is also followed by "bada da da diddly da." So if you hear some kid in the street humming this, you know what time it is.
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.