Cycle Wh-ring is the same thing as a Reddit Karma Wh-re. They ask to "please mark as correct answer thanks" EVERY TIME THEY POST AN ANSWER and BEG FOR UPVOTES. They are extremely annoying and obnoxious and are looked down upon. Notable Cycle Wh-res include PattanAhmed (the second biggest), rohilpatel (the biggest), and TheUnkownCoder.
Q: What makes a Cycle Wh-re a cycle wh-re? Everyone does it in some way or another.
A: If a person has added MARKDOWN or some other sort of styling in a share/tutorial post to make a "please upvote" more notable, it is a cycle wh-re. Casually pointing it out inside normal text is fine.
Q: When can I say, Please mark as the correct answer?
A: Only after the person has acknowledged that you answered his question and has not marked your answer as the correct one, only then can you ask to mark as correct answer.
Q: What happens if I am a Cycle Wh-re?
A: You get looked down upon and the CYCLEWH*RESTAPO may come and kidnap you to low-effort camp.