A commonly accepted law which dictates certain interactions in costal areas of recreation. The rules favor the winner of physical conflicts between two parties and usually end in the superior party recieving an object of great significance.
TL,DR: Screw you Orlando Bloom, I kick your ass I take your girl.
Beach Rules Examples
ex) Party 1 has an object of significance (attractive females)
Party 2 challenges Part 1 and wins
Party 2 has the oppourtunity of taking the attractive female and other objects of importance.