The unpleasant realization that, when assembling a purchased product, the painful discovery that the manufacturer has not included enough screws, bolts, nuts, etc. to complete the assembly. The word is derived from the character of Scrooge depicted in Charles Dicken's "A Christmas Carol". The word represents the frustration created by a manufacturer's miserly policy of not spending just a few extra cents to make sure enough parts were provided for proper assembly
Jack was assembling the bicycle he had bought for Johnny, but found out he was screwged when there weren't enough bolts supplied.
When the Ghosts of Christmas Past, Present & Future DON'T visit your employer and turn him into a kind caring and generous human being.
When yet another year goes by without bonuses, raises, incentives, a Chrismas party for the employees, or even a modicum of recognition, appreciation, or achievement for a job well done, while the boss drives home in his brand new BMW or custom Silverado to his brand new house that your work has paid for - you have been SCREW-GED!