What would you do without it--seriously? It fuels those brain cells of yours as you stare at the computer screen, trying to think up some absolutely brilliant conceptual arguments on which to hang your dissertation chapters. It adds an artificial spring to your step as you scale the eight flights of stairs to your department office because the elevator's broken. It gives you that je ne sais quoi that tells people "yes, I'm cool and mellow and intellectual." And it just tastes good. Thank god for coffee.
Sample sentence: Is this my tenth or twelfth cup of coffee today???