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5.
An extremely superb piece of music. Songs 10 years and older can be considered to be "The Jam", although The Jam bears no age due to the fact that it remains timeless. Songs under the age of 10 years can sometimes show signs of reaching the maturity level of "The Jam" but are not considered to be "The Jam" for they will be one when it ripens after a decade of appreciation. It is found on many fm radio stations claiming to play: old school, classic rock, r & b, hip-hop, classical, jazz, alternative, country, etc. etc..
I love this song, I can't believe they're playing it on the radio right now.

I know, it's 'The Jam'

or

She all dillbot on top of that car and stuff mayn

Yeah dude, it's 'The Jam'
by Hall & Oates September 13, 2010
 
1.
A British three peice mod revival band from the 70's and 80's.
The Jams most famous song is probably A Town Called Malice.
by Urban Dictionary September 14, 2005
 
2.
Used to describe something that was really fun or cool.
'That was the jam' is sort of the same thing as 'that was a blast' or 'that was a ball.'

It's pretty much the Jam. That show was the Jam. Etc.

by Dana S. November 08, 2005
 
3.
One of the defining bands of the late 70's / early 80's,

members included: Paul Weller , Bruce Foxton and Rick Buckler
Ultimately legendary!
Ann: 'The Jam' rule
Pete: yes lass, that they do
by joshindustries July 01, 2006
 
4.
Used to describe anything that is awesome.

Used similarly to "it's the shit."
"Hey have you checked out that new mexican restaurant?"

"Yeah, man, it's the jam!"
by lil'le December 11, 2009