1. An adjective used to show how you damn good you think something is.
2. The opposite of a bad ass; a non-violet, level-headed young person.
3. A particularly fine bottom.
1. "This is a good ass piece of cheese!"
2. "Look at that guy, studying when he could be could be doing semi-illegal things! Pah, what a good ass!"
3. "You see that girl? I think she has a really good ass!"
a term used much like bad ass
but is used as to not create any confusion about the situation.
to clarify things
man that was a bad ass game of pool...
What man did you lose?
No man it was good i won...(Here would be a perfect situation to use good ass)