"That's out of the question!" "Huh?!"

In TOEFL, I was both fascinated and troubled by the fact we have to learn the way American speaks. One question goes:

"
Woman: I think we should see if Jackie will run for class president.
Man: That's out of the question.

Question: What does the man mean?
"

"Out of the question"? Do you mean the question is not valid because Jackie is the best candidate, or Jackie is the worst candidate? Whoever invented the phrase did not indicate polarity of emotions... Its a very badly phrase sentence. And how am I to know if he is happy or sad? We might as well use "Wah lao." (Singlish phrase. In English: My father!)

Re:
1. Its shorter.
2. You know its not pleasant when a parent (or god) were mentioned.