It's when you're mom gets boned some awesomeley with pies and tacos so explodes.
Billy: Hey Tom did you hear what I did last night?
Tom: What did you do?
Billy: I did Super mega awesome to the power of pie divided by taco with a cherry on top with your mom with your mom.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!