A fork of Rural Dictionary
noun 1. A time of crisis or need. 2. When you have a bad feeling about a certain moment that is about to happen.
"I'm bad at soccer, so my Papa John's Day of Reckoning is P.E."
idiom Trying to do something that seems to be impossible
Friend 1 is trying to make an invention without any knowledge about anything related to it. Friend 2: Hey, stop trying to jump to the moon!