Hooking up with a frump. Like hogging, but with a bagger or butterface instead of a fat chick. Making it with an ugly or homely girl; screwing a frumpet.
Don went frumping last night and he hooked up with a total Cleveland Brown - she looked nice from the neck down, but she was pretty ugly above the shoulders.
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.