An extremely nerdy person who hides behind a computer screen. Their extremely ugly, fugly and fat.
It's the WORST kind of person you'd want to run into online. They'll stalk you, their persistent, and they do NOT take rejection well, because..once you get a Pizza Nerd after you. THEY'LL NEVER STOP!
Only way to stop the Pizza Nerd is to brutally reject them, and/or blocking them out of your life COMPLETELY.
BEWARE OF THE PIZZA NERDS! D: