Definitions by DW5

brain fart 

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."

brain fart by DW5 December 28, 2008