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1.
an anal emission that is so putrid that all four windows of a motor vehicle have to be opened simultaneously.
While we were driving, my wife let out a four window fart. Two windows would not be sufficient to evacuate the stink.
by Dirk Olson February 07, 2011
 
2.
blowing air out of your gludies maximus after intaking food that your stomach does not exactly agree with.
I was sitting in the car and all the sudden i smelled this horrible stench! It was so horrible, that we couldnt get rid of it unless we rolled all the windows down in the car.
hence the word "four window fart"
by Sammyy Wilson October 15, 2007