adv.
1. Possibly but not certainly; uncertain
2. Maybe; possibly
3. Risky 4. No guarentees
5. Results could be positive or negative
"Jonathan said to his young armor-bearer, "Come, let's go over to the outpost of those uncircumcised fellows. Perhaps the Lord will act in our behalf. Nothing can hinder the Lord from saving, whether by many or by few."
~ 1 Samuel 14:6 (NIV)
The answer to any question that you don't know the answer to.
In many cases, it leaves the person in a state confused bewilderment when you answer with it.
Person: Wanna go get some food?
You: Perhaps.
Person: Hey, do you know what the time is?
You: Perhaps.
The true more devious form of saying maybe while having some class. It still makes you a douche bag if 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?"
...
