Last night's It's Always Sunny was about re-capturing lost youth, missed opportunities, and getting tazed. Oh, and Frank burning everyone's retinas by wearing skinny jeans.
The gang tried to reignite a 10-year-old flip cup rivalry with a nearby bar. In order to recruit a replacement for Dee (because she was terrible, obviously), Dennis and Frank go to a frat at the University of Pennsylvania. It all ends quite predictably with Dennis getting tazed repeatedly and Frank snorting fat rails of "tasty Riterall".