- Yeah.. hmm.. she was decent
- What? No dude, she was such an MFC!
- There was this chick sitting next to me in EOSC today. Total MFC.
This is a more "mixed company" friendly way to express the above expletive. This can be used as an adjective but it's more commonly just used as an angry outburst.
Joe - "Hey, Tom, I just saw Pete with his tongue down Kelly's throat. Isn't she supposed to be YOUR girlfriend?"
Tom - "MFCS!!!!!"