"infamous question" is correct and usable in written English.
It can be used to describe a question that is well-known or notorious for causing controversy, debate, or trouble. Example: The senator was grilled by reporters about an infamous question she had posed during a previous press conference, causing a new round of controversy.
But once the relief wore off, my eager mind once again brought up the infamous question: What now?
Such questions stack up in depressingly large numbers on the two biggest Q&A sites, WikiAnswers and Yahoo Answers; the latter is particularly renowned, its most infamous question is "how is babby formed?
Consider Beyoncé's infamous question and answer: "Who run the world?
The most infamous question of the next two decades - "Are you now or have you ever been....? - had entered the American lexicon.
Students sold t-shirts and built costumes in honor of a confusing and now infamous question on this year's exam about a talking pineapple... 'They're just trying to use our brains like we're lab rats,' said a third-grade student.
Just when it looked like its 15 seconds of fame were up, a ballsy kid reignited the commotion by blindsiding Michael Jordan with the infamous question, leaving the most notable shoe-shiller of all time completely bewildered.
This bitchin' sub cabinet features two original Mario blocks, including the infamous question-mark block.
And they hope that when all the debris is cleared, they might have another shot at answering the now infamous local question.
"Maybe," he replied, careful not to succumb to the infamous what-if questinsistentlyntly posed by excitable bird watchers, anglers and weather watchers the world round.
Last year, nationally, the controversies centered on the infamous "Pineapple question" and similar absurdities.
"Affirmative Action for Muslims in the White House?" Ah yes, the infamous Drudge question mark.
