The act of actually taking the time to come up with a retarded idea in order to either A)Amuse your friends or B)Amuse yourself. What people usually don't undersand is that "A)" will never happen because people will just think you are a retard.
Walking into the factory with just his pajamas on, the man didn't realize he had just committed Premeditated Retardation.
The act of pretending to have symptoms of illness at work (i.e. excessive coughing, pretending to vomit) in an effort to convince everyone that you are really sick. This way when you play hookie on the monday after your weekend drinking binge your co-workers will believe that your calling-in-sick is legitimate.
Man #1: "Man, Ken sure is coughing a lot, and makes a point that everyone can hear it."
Man #2: "Yeah, but listen to how fake that obviously is...he's practicing premeditated infirmary..."
Man #1: "Yeah I thought it sounded fake, what tool"
Man #1: "I see Kenny didn't come to work today"
Man #2: "Douchebag...."