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2.
This occurs when two nerds are having an open confrontation regarding an exceedingly nerdy topic.
Eugene and Alvin had a nerdoff over who is the best captain: Kirk or Picard.
by jonka April 10, 2007
 
1.
Pleasuring one's self with knowledge; usually with assistance from a textbook, pencil, calculator,and/or pocket protector.
John got a detention when his physics teacher caught him nerding-off in the bathroom in the chapter on quantum mechanics. This was the first sexual assault of a physics book ever recorded.
by cooler April 12, 2004