It was one time, I was drunk!
From the archives of TiPWiki, the unofficial Duke TIP Wiki
"It was one time, I was drunk!" was originally said by Kinky Tom in order to explain his sexual escapades to several fourth-years. Put into widespread use by Claire Costantino, Kim Levitt, Kristin Person, and Lauren Thomas, this phrase became the motto of many TIPsters at East Term II. Brought about during a particularly rousing game of 10 Fingers (Never Have I Ever) at the Durham Bulls baseball game, the tradition of proclaiming the singularity and drunken-ness of a particularly embarrassing action was buried in the hearts of many TIPsters.