Starbucks Shitageddon Share definition Flag When you drink at Starbucks after using an Antibiotic, and ending up taking a shit for the next sixteen years. "Holy shit, I think I just had a Starbucks Shitageddon last night." Starbucks Shitageddon by Captain Cocksocks April 21, 2010 Get the Starbucks Shitageddon mug.