A word from the Nadsat language of A Clockwork Orange. Trying to figure out what to do, making up your mind; making a decision. Sometimes used in place of the word "mind."
And we sat in the Korova milk bar trying to make up our rasoodocks about what to do with the evening.
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!