Not Bad
Good
Example
What do you think of my painting?
Not bad
Thanks!

Related Slang
Bussin | Really good |
GJ | Good job |
Fire | Awesome |
Gas | Great |
Fye | Awesome |
Cold | Awesome |
gr8 | Great |
amazn | Amazing |
Attaboy | Good job |
GW | Good work |
azm | Awesome |
Meme | A piece of media that spreads via the Internet |
When someone describes something as "not bad," they are actually saying it's pretty good or even great. For example, after killing your saxophone solo at the school concert, your dad may describe your performance as "not bad."
People who use "not bad" are likely known for being understated, whether it's their personality or a reflection of the culture in which they grew up. For example, Minnesotans often describe good things as not bad partially because of the strong influence Scandinavians (known for being reserved or stoic) have had on their culture. For many in this position, it may be challenging to give an outright compliment, thus, the "not bad" sentiment.
Nuanced use
While people may use it online or in messages when describing something's quality, you will often hear people use it in real life (IRL). In these cases, its meaning is more nuanced.
For example, if the person emphatically says, "Not bad!" they thought it was great. But if they say, "Not ... bad," with some hesitation at the end, they may think it was good or maybe just serviceable.