Fap crap and nap comprises the three most important facets to a daily regimen. Masturbation, defecation and siesta. It should be performed in that order for maximum efficacy. It is often utilised by university students as a means to maximise brainpower where required.
Student 1: Mate class sucks today, I don't know how much longer I can endure it.
Student 2: Yeah bro might be time to ditch and hit that FCN.
Student 1: Yeah a fap crap and nap will definitely perk me up.
Both students receive high distinctions despite missing 2/3 of class for the semester.
A take on "holy crap." But in this case, more to do with self-masturbation. Used when someone does or says a complete lie or exaggeration to make self better than he/she seems.
Joe: I have a weekend job.
Jim: Oh yea? I volunteer at the shelter. What do you do?
Joe: *thinking hard on his feet, makes something up* I'm a burlesque dancer named Emerald Princess. I do all this for charity, of course.
Jim: ... Crap Fap.