Fifth Wheel

發表者 tluroc76 開 2008-09-02 00:07:34
Topic for this week is "Fifth Wheel".
There are several definitions for the term but we are looking for one that describes the following:

"Jack's job duties have been greatly reduced over the last year. He feels like a fifth wheel in his department."

What does "fifth wheel" mean in this case?

Could you provide another example?