A Level of frustration that has been reached beyond one's control of proper language comprehension. A blur of words caused by becoming extremely pissed off. Often culminating in some form of physical or verbal retaliation.
I was hitting on this girl but this other kid wouldn't take a hint and fuck off. I got to such a level of fuck-stration I punched him in the face.
A sexual relationship with no strings attached. More than a one night stand as it may occur on a regular basis, but less than friends with benefits as there are no dinner dates or deep conversations involved.
The fucktationship allowed both Susan and Sport Model the freedom to enjoy great sex with no intention of taking it further.
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.