A frayed knot (aka Afraid Not) is a poor excuse given when someone isn't going out with a group of friends. Usually it means to try harder to persuade someone.
Symbolic of the once tight bonds of a relationship that are now wearing thin. A little extra pressure will break the bonds.
When Scott is asked to meet with some old friends, he responds sheepishly saying "Frayed knot, I'm spending the evening with my wife"
A Red Steve is the type of person who pretends to be very left wing. He truly cares so much for the planet that he owns at least 2 cars (one of which must be a gas guzzling SUV) and drives to work.
You just pretend to care. You are such a Red Steve