One of those spontaneous drunken terms which are created at 3am. Let me try to define it: The act of being really messed up, hence the "ficated" at the end.
(mass-if-I)
The scientific slang term for finding the mass of a particular object, often in high pressure or hurried circumstances.
From the other side of the laboratory Riley shouted in distress, "Massify MASSIFY", the timer had run out already- however, and the experiment was moot.