When you go from doing other stuff to doing nerd things for about a week to a month; such as jailbreaking your iPod Touch
, or Youtubing
videos on help on how to do something with your device. After you lose interest, you go back to the same old normal stuff you do.
Mark: Dude, you should come chill with us.
Tim: Nah, I think I'm gonna jailbreak my iPod Touch this week.
Jeff: He's on his nerd phase.