look up any word, like jamflex:
 
1.
the best, really really good, excellent
This sound is the joint. This music is the joint. The new CD -it's the joint. This joint is the joint.
by John D V May 27, 2006
 
2.
Noun - The Prison. In some cases may be Jail but usually refers to "doing hard time".

He's been in the joint for 20 years.
by Kuerno May 30, 2008