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1 definition by DW5

 
1.
When someone does not perform an action that obviously should have been done, especially when you are under pressure and must think quickly.
Phillies fan: "Dude, Rod Barajas had a brain fart last night! He should have blocked the plate instead of standing up!"

Mets Fan: "That's not a surprise."
by DW5 May 26, 2007