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1.
The act of cock-blocking oneself by saying something extremely stupid. When you don't need a cock-blocker - when you can do it all by yourself.
Danny was being hit on by some hot chicks at the bar but he said something so stupid he actually auto cock-blocked himself.
by Oscar12345 August 17, 2008
 
2.
When you say something to the girl you are hitting on that makes you loose any chance of having sex with her.
Namyr can't get a girl because he's always doing autocockblocks.
by Francisco Garcia Gonzalez October 10, 2007