When a naked man does consecutive standing pelvic thrusts into the air, which results in a between-the-legs swinging; pendulum-like motion where both balls, and penis simultaneously make contact with one self, causing an audible phenomenon.
When Richard found out the baby wasn't his, he did a flappy pappy for damn nearten minutes!
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.