The word works in any situation, at any moment, unless you're not the english teacher. You can sometimes use the word twice in a sentence if the situation calls for it.
The true more devious form of saying maybe while having some class. It still makes you a douche bagif you don't confirm your answer. Ellipses add extra confusion just to mess around.
Fred: "Hey, wanna grab some drinks tonight?"
Bill: "Perhaps..."
Fred: "Is that a yes or no though?"
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