A term made popular by Ashanti (R&B singer) and her song titled "Good Good"
It is usually used in two instances.
1.) super potent drugs
2.) bomb ass pussy
1.) "aye yo mayne, yu good?"
"yeah mayne, you know i stay wit dat good good mah
2.) "mayne, shawty girl got dat good good!"
"oooh girrrl! i had him bout to cry! he know i got dat good