Fuck, I haven't heard the story in so long, I guess head-canon got the best of me. Either way, he just makes shit up to sound like his life is a bajillion times more interesting than it really is.
I would hazard a guess that if there's a "nugget of truth" to that tale... It was: There was a dorm party that he happened to waddle into, he stood in the corner and fantasized about some girl, drank shitty beer, fire alarm went off somehow, before he could 'tism-sprint away he was stopped by campus security and he mush-mouthed his way into saying "I dindunuffin!" Later on, his story became this overblown tale of being a total Chad who always had gin on hand and bitches at his door.
Edit - For clarification's sake, here's the video:
https://youtube.com/watch?v=foI_LqJLNtk