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3.
A saying refering to a feeling of awesome-ness.

Most often said at parties as a reply to the question "How you doin?"
Tristan - "How ya doin?"
Erika - "Good."
Tristan - " Pretty Good ."
by syndrath April 15, 2009
 
1.
Not so good, around 80% complete of a good thing or a person
ash: how is your old ps2?
Me: it's still pretty good
by AsianSAGE October 16, 2014
 
2.
The equivalent of amazing. Has a somewhat sarcastic tone. When used with this meaning, the speaker would most likely sound excited as opposed to the usual monotone "oh I don't know. It's pretty good, I guess."
"You got a new car? That's pretty good!"
by Brenna Mae October 02, 2006