A tridrunkalon is a competitive athletic event most often comprised of drinking a cheap beer, riding a bicycle offroad, and running. It is often considered the more sophisticated and difficult version of a triathlon.
Dan's mom doesn't think he will ever win another tridrunkalon.
The act of becoming so enraged that you have the urge to throw whatever object might be in your hands, such as a bicycle.
One second he was using it as a walker, the next second he went Chad-Postal