This is a rough translation from a norwegian Guinness book of Records, from 1968:

The shortest game ever registered between two grand masters, was in four moves. Lazard defeated Gibaud in a chess cafè in Paris in 1924.

White played like a 400 player.

why did white resign??

Because he either had to lose his queen or open up his king

Isnt a game that ends with 0 or 1 move being played (opponent refusing to appear to make a move)technically a shorter game?

For example, Fischer vs Spassky - game 2 or Kramnik vs Topalov, game 5.

I think this is a wrong statement... THe two move checkmate is the shortest game in history... i even know some people who resign after thier first move, SO THIS IS FAKE! ;)

Note the "between two professional players" part

no, i think its actually'

 This is wrong. The move is  4... Ne3!! , not 4. ... Nxf2?

ya it should be 4. ...Ne3!!

Yep, you're right (between Kovacevich and somebody else).  It was an actual tournament game, and they were both masters.

Neither Lazard nor Gibaud were GMs by the way, and it was an offhand game (although some say it never actually took place at all).