1) Fuck- In the older times, a couple who wanted sexual intercourse would have to seek audiance with the King. The King would then sign a document, code named, "F.U.C.K" With his approval if the couple were allowed to have children or not.
It is an acronym from the middle ages Fornication Under
Consent of the
King
You would see that on a sign on a door which meant do not disturb because they were trying to make a baby.
People eventually just shorten it to F.U.C.K.
'Frolic' spoken quickly with a thick Scottish accent or by a body with no front teeth, it is phonetically interpretted and then written in English as it sounds.