Top Definition
Referencing well-known medical drama 'Grey's Anatomy,' GSWI is the sudden onset of remembering events, usually regrettable, that occured previously while heavily intoxicated, just as the late George O'Malley remembered his adulterous sex with Isobel Stevens.
"Oh no, last thursday night! George slept with Izzie."
"Ohh no, what did you do? ..."
by afewtoomany. October 23, 2009

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