This is another usage of the word "fap", which means to masturbate. There are three distinct levels of fapping. A Fapper is someone who spends a part his day fapping. The Fapper probably faps at least twice a day. Of the three levels of fapping, a Fapper is the lowest level. This is a person you should avoid shaking the hand of some of the time.
Dude 1: "Stop spending all your time fapping!"
Dude 2: "I don't, Dude 1, I am just an average regular Fapper.
Fap-a-saurus Rex: "Wanna arm wrestle?"
FAP is easy. The assignments are pretty easy as well and it doesn't meet the SOA standards in terms of difficulty. This is just my opinion and I hope it doesn't offend FAPPERS as I am one of them as well.