gayin it up is basically not wanting to help or join others in time of need, not co-operating, or when someone is just being VERY difficult and/or selfish.
OR just acting in a homosexual manner.
Tom does not want to play Xbox with us there for he is gayin it up.,
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!