Used for obscuring text by replacing each letter with the letter thirteen places down the alphabet. A becomes N, B becomes O and so on. This is used in online forums as a means of hiding joke punchlines, puzzle solutions, movie and story spoilers, and offensive materials from the casual glance.
Hello in ROT13 is "URYYB"
by SCANK April 18, 2005
shol and bri rot13'd colin's face because he was being disobedient to the supreme rule of females... ON A SUNDAY.
by sholanna April 13, 2008