Someone who severely procrastinate and loses their amenity of procrastinating; therefore, the heavy procrastinators become pro at crastinating.
David: Mr. Goodger, I'm going to procrastinate on my Trig and Pre-AP Physics test. I'm good at procrastinating.
Mr. Goodger: Be careful David, if you procrastinate too much, you will lose your amenity become a pro at crastinating. In other word, pro-crastinating.
David: Ha! whateva, da crew n i r goin' driftin' at da zoo!
Hillary Rodham Clinton has no experience, no true conscience, an incredible security risk of a husband, just enough intelligence to be dangerous, and is the very definition of a castrating bitch.