(1) A terse and deliberately understated manner of expressing that something is less than hoped. (2) a way of understating a substantial problem, mess, or catastrophe.

Sometimes expressed with a suspenseful interlocutor such as "ummm," "errr," or a gesture of consideration like a glance or a finger on the lip.

Q: How was your first day at the marketing firm with your new boss?
A: I just got home from work after a day with my crazy boss, umm, not good.

Ex 2: Did you see that plane hit the tower? Wow, not good.
by Bernadette Olsen February 1, 2006
A sarcastic and cynical way to shut someone up by agreeing to whatever they say. Often said very quickly, making it sound like "gud gud gud"
Prashanth : hey Mr Lim, as you can see I did all my work, it wasn't easy because........
Mr Lim: *interrupts* good good good
Prashanth : ...........
by psundar3 August 12, 2011
top notch pusssy or dick that'll get you sprung quickfast!
"shorty got that good-good"
by rhenvar January 15, 2010
High quality kegel muscles that keep your significant other coming back and not looking for other people to satisfy their needs.
So I've been dating this guy for three weeks, and yesterday he told me he loved me. I got that Good Good.

Also refer to Ashanti's song Good Good.
by Ms. GG April 8, 2009