Some fun definitions and terms I thought up (but you know, someone else may have had the same ideas, too).

Definition: "angst" - A group or gathering of teenagers would be an "angst" of teenagers.
Definition: "SPAX" - those annoying wastes of paper where your fax machine is deluged by unsolicited SPAM-style $99 vacations, cheap interest rates, and shoddy furniture.
Definition: "frigahertz" - a computer chip that is unbelievably fast would be said to be running at a few frigahertz