To cross one's fingers is a hand gesture used to superstitiously wish for good luck or to nullify a promise. The supposed loophole of crossing one's fingers whilst making a promise is usually exploited by school-aged children.
Crossing one's fingers, by curling the middle finger over the index, is thought to bring good luck. This dates back to when crossed fingers were used as a gesture to ward off witches and others considered to be or possess evil spirits. It is also seen as bad luck to cross your fingers on both hands.
Christians believe that crossing one's fingers is to affirm one's faith in Jesus Christ who died on a Cross (thus crossed fingers) in Palestine under Roman rule. Crossing one's fingers may have been used as a secret sign amongst Christian believers, especially during persecution.
Some believe that the gesture originates from pre-Christian times and, in many early European cultures, two people were required to use their index fingers to form the sign, one to make a wish and the other to support it. It was believed that the cross was a symbol of unity and that benign spirits dwelt at its intersecting point—to wish on a cross was a figurative way of securing the wish at the intersection until it came true. Over the years, the custom was modified so one person could make a wish on his/her own.
The 'crossed fingers' gesture is used for the logo of the United Kingdom's National Lottery, as well as the Oregon Lottery in the United States.
Crossed fingers behind the back can also be used when making a promise or a claim to indicate that you are lying. This has been used in television and movies to clue in the viewers while keeping other characters in the dark.from wikipedia
Aku tak de la banyak pengetahuan agama..But then, using this phrase to say that "you want something" doesn't sound right to me, as a muslim...What do you think??? ...