a fuckingfringe is some1 who is on the fringe of an organisation/club/social circle and deems himself/herself to be "in" and "cool". infact they r often made fun of, and ridiculed. they r the monkey boy, used 2 do all menial tasks.
To descibe a situation, sombody or something which is so hideously bad it is beyond belief. This phrase is often backed by an arm gesture (a little like limp handed punch) to allow the audience to realise the severity of the horendesness before them.
Person A: "Did you see what 'Laura' was wearing the other day?"
Person B: "Yeah i did it was FuckingBad" (completed with limp handed punch so that person A realises just how bad the outfit was.