When you accidently make twoplans/dates for the same night or day.
Ryan: "What are you doing next Friday night?"
deth: "Oh, i'm going to the artwalk with Heidi...Oh, crap! I was supposed to go see this band with someone else the same night..! Looks like I've doublebooked myself again.""
A term used by someone to get out of a commitment at the last minute due to ignorance, lack of communication or being strong-armed by another individual. People who use doublebooked as an excuse for such an act usually try to lay blame on anyone but themselves, such as a family member or friend, instead of taking responsibility for their disappointing behavior.
He told the group of friends that we was doublebooked two days before the concert, even though it had been planned for nearly a year.
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!