A colon that regularly produces a poopy every day at the same time without fail.
Like a swiss watch, a Swiss Colon cranks out a doogie with tremendous timing precision.
Blair: Dude, every morning you head to the John at the same time, with newspaper in tow.
Mark: I've got a Swiss Colon. It arrives every day on time, at 9:22 precisely.
Blair: Swiss Colon. It's a gift of consistency.
Mark: Ja.