As coined by the upcoming gross and insulting movie, the Dark Show.
Sanchez: Hey, why so glum?
Rusty: Ah, my mom caught me Running the Finger-shuttle Between Headsville and Balls Falls.
Sanchez: Meaning, your mom caught you masturbating.
Rusty: In a nutshell.
Sanchez: Man, if your mom caught me masturbating, I bet I'd end up fucking her.
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!