"== Another, possibly more larger scaling insult == 

 Is the thrusting of one's hand, through a clasped or clasping other hand, with one's index finger curled, but extended and third (middle finger) slightly extended, but also curled, whist grasped by the opposing hand behind the wrist, with a wiggling up and down motion of the hand. That signified ""up the anus, with lots of room to move"" in Saudi and similar, potentially without the wiggle of the hand, in other cultures that were exposed to Arabic cultures. One will suffice it to say, give that insult to an Arab who has a knife, one would rapidly find said knife drawn with serious intent.  "