Question asked that is asked for effect and not usually designed for an answer.
Usually encourages the person or people being asked the question to reflect upon their own thoughts and beliefs rather than answer specifically out loud.
Examples of rhetorical questions-
Speaker: "What defense to the homeless have if the government will not protect them?"
Guy: "Did you get some from her last night?"
Other Guy: "Is the sky blue?"
Office Worker: "How stupid is this new filing system we have?"
A question asked in which one already knows the answer to not expecting reply; simply to be a dick, to annoy you, or for some other odd reason.
"Why'd you get me pregnant Jonny?"
"I thought you loved children?!"
"I do! I just wanted to make sure you remembered.(:"
"You're a crazy hoe, I'm out! Call me when you need child support. Better yet, I'll give you a booty call within the week."
Now you see, the moral of the story is never to ask rhetorical questions.
A question asked of someone either in identical or varied form by that same person or persons.
It typically cannot be answered since it would have previously been answered.
Therefore, the expectation of that person or persons being questioned is that they need not be expected to respond to it (wastes time and useful energy).
The questioning tends to be done somewhat annoyingly to add emphasis to an initial query. However, the net result is more like an annoying interrogation.
See also: retorical
"Did you look in area X as you said you would?"
"Yes I did. I searched thoroughly but without success."
Me:who wants a fun fact?
SF:who cares u hoe?
Me:that was a rhetoricalquestion...
SF:what does that mean?
Me:a ̨͙͕̺̑͗̆̚r̴̤̙̪̔͊̍ĕ̵͜ ̥̮̅̓ỹ̵͙̆͊̉o ̣̮̣̊̈́̾͠ư̴͚̦͊͐ ͆͜r̵̛̔͋̓ͅę̵͉̬̂͘̚͝t̵̨̮͊͊̀̉ͅȧ̵̳͎̣̙̀̚̕r̴̨̘͈̗̈́̍̒̚d̴̨͆e̴̬͑d̵̛̗̘̀͊̚?̵̦̬̽̔͊͝