Very rare. Cousin of the dingleberry, a hackleberry is a klump of crap that connects more than 5 hairs on your ass joining your cheecks together like allies.
Back in '94, I heardFrankgot a hackleberry that forced him to miss his company's golf outing.
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.