This is any type of lollygagging, undesired horseplay, or any type of "gay" behavior.
Gay in the same sense as other slang meanings, not necessarily homosexual.
Any type of intentionally procrastinative activity.
Akin to "Grabass"
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!