That moment when you feel like you have accomplished something beyond your capabilities. In other words it means the act of being incredibly awesome and hilarious. This word originated from the work tronk, which is a replacement word for the most part, anything. For example, "Rogain is a tronk." or "This is bulltronk." Given this information tronktastic is a way of being.
Tiler and Rachel are tronktastic because they are saving Trudy from her evil clones!
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.